Subscribe to RSS
DOI: 10.1055/s-2007-977449
Stereoselective 1,3-Dipolar Cycloaddition of a Maleate Derivative with Azomethine Ylides Derived from α-Amino Esters: Synthesis of 3-Pyrrolines
Publication History
Publication Date:
08 May 2007 (online)
Abstract
A new preparation of 3-pyrrolines is described by [3+2] cycloadditions of N-metalated azomethine ylides derived from α-amino esters with a dimethyl 7-oxabicyclo[2.2.1]hepta-2,5-diene-2,3-dicarboxylate derivative, followed by retro-Diels-Alder reactions. This two-step sequence appears superior to the direct reaction of ylides with dimethyl acetylenedicarboxylate and should be applicable to solid-phase synthesis.
Key words
cycloadditions - amino esters - ylides - diastereoselectivity - retro reactions
- 1
Soret A.Blanco L.Deloisy S. Lett. Org. Chem. 2006, 3: 648 - 2
Blanco L.Bloch R.Bugnet E.Deloisy S. Tetrahedron Lett. 2000, 41: 7875 -
3a
Anderson W.Kinder FR. J. Heterocycl. Chem. 1990, 27: 975 -
3b
Komatsu M.Ohno M.Tsuno S.Ohshiro Y. Chem. Lett. 1990, 575 -
3c
Grigg R.Gunaratne NHQ.Kemp J. Tetrahedron 1990, 46: 6467 - 4 For a solid-phase application of this methodology, see:
Komatsu M.Okada H.Akaki T.Oderaotoshi Y.Minakata S. Org. Lett. 2002, 4: 3505 -
5a
Pandey G.Banerjee P.Gadre SR. Chem. Rev. 2006, 106: 4484 -
5b
Husinec S.Savic V. Tetrahedron: Asymmetry 2005, 16: 2047 -
5c
Najara C.Sansano JM. Curr. Org. Chem. 2003, 7: 1105 -
5d
Harwood LM.Vickers RJ. In The Chemistry of Heterocyclic Compounds Vol. 59:Padwa A.Pearson WH. John Wiley and Sons; New York: 2002. p.169-252 -
5e
Broggini G.Zecchi G. Synthesis 1999, 905 -
5f
Grigg R.Sridharan V. In Advances in Cycloaddition Vol. 3:Curran OP. JAI Press; Greenwich CT: 1993. p.161-204 -
6a
Grigg R.Montgomery J.Somasunderam A. Tetrahedron 1992, 48: 10431 -
6b
Nyerges M.Rudas M.Tòth G.Herényi B.Kàdas I.Bitter I.Töke L. Tetrahedron 1995, 51: 13321 - 13
Katritzky AR.Hitchings GJ.Zhao X. Synthesis 1991, 863 - 16
Farrugia LJ. J. Appl. Cryst. 1997, 30: 565
References and Notes
Trimethyl (1
S
*,3
S
*,3a
R
*,4
R
*,7
S
*,7a
S
*)-7-[4-(Benzyl-oxy)phenylmethyl]-3-phenyl-2,3,3a,4,7,7a-hexahydro-1
H
-4,7-epoxyisoindole-1,3a,7a-tricarboxylate (4a)
White solid; mp 106 °C. 1H NMR (400 MHz, CDCl3): δ = 2.93 (s, 3 H), 3.25 (d, J = 15.2 Hz, 1 H), 3.48 (d, J = 15.2 Hz, 1 H), 3.81 (s, 3 H), 3.86 (s, 3 H), 4.41 (s, 1 H), 4.45 (s, 1 H), 4.95 (s, 1 H), 5.07 (s, 2 H), 6.15 (d, J = 6.0 Hz, 1 H), 6.66 (d, J = 6.0 Hz, 1 H), 6.96 (d, J = 8.4 Hz, 2 H), 7.27 (d, J = 8.4 Hz, 2 H), 7.29-7.92 (m, 10 H). 13C NMR (100 MHz, CDCl3): δ = 35.0, 51.5, 52.0, 52.4, 66.6, 70.0, 70.1, 73.5, 82.6, 83.9, 94.5, 114.5, 127.2, 127.6, 128.1, 128.4, 128.5, 128.6, 129.3, 131.4, 133.4, 137.2, 137.8, 141.3, 157.6, 169.8, 170.9, 171.2. IR (KBr): 3307, 1744, 1731, 1609, 1581, 1511, 1452, 1431, 1245, 1222, 1106 cm-1. MS (ES+): m/z (%) = 320 (100) [pyrroline 10 + H]+, 342 (16) [pyrroline 10 + Na]+. Anal. Calcd for C34H33NO8: C, 69.97; H, 5.70; N, 2.40. Found: C, 69.81; H, 5.67; N, 2.27.
Trimethyl (1 S *,3 S *,3a R *,4 S *,7 R *,7a S *)-1-[4-(Benzoyl-oxy)phenylmethyl]-4-[4-(benzyloxy)phenylmethyl]-3-phenyl-2,3,3a,4,7,7a-hexahydro-1 H -4,7-epoxyisoindole-1,3a,7a-tricarboxylate (7f) Oil. 1H NMR (250 MHz, CDCl3): δ = 1.95 (d, J = 15.0 Hz, 1 H), 2.40 (d, J = 15.0 Hz, 1 H), 3.09 (d, J = 14.0 Hz, 1 H), 3.49 (d, J = 14.0 Hz, 1 H), 3.73 (s, 3 H), 3.84 (s, 3 H), 3.99 (s, 3 H), 4.77 (d, J = 1.8 Hz, 1 H), 4.94 (s, 2 H), 5.97 (br s, 1 H), 6.00 (dd, J = 5.5, 1.8 Hz, 1 H), 6.49 (d, J = 5.5 Hz, 1 H), 6.75 (d, J = 8.8 Hz, 2 H), 6.90 (d, J = 8.8 Hz, 2 H), 7.04 (d, J = 8.5 Hz, 2 H), 7.31-7.60 (m, 15 H), 8.15 (d, J = 7.0 Hz, 2 H). 13C NMR (62.9 MHz, CDCl3): δ = 35.1, 37.1, 52.1, 52.5, 52.8, 65.2, 69.8, 70.8, 74.4, 81.7, 83.6, 96.9, 114.1, 120.9, 127.4, 127.7, 127.8, 127.9, 128.1, 128.5, 130.1, 130.4, 131.0, 131.6, 131.8, 132.5, 133.2, 133.3, 133.4, 137.1, 137.4, 145.6, 149.6, 157.1, 165.0, 169.5, 170.6, 172.9. IR (neat): 3327, 3060, 3028, 3005, 2951, 2851, 1738, 1729, 1713, 1604, 1584, 1506, 1469, 1451, 1433, 1245, 1198, 1169, 1080, 1060 cm-1. MS (ES+): m/z (%) = 522 (100) [pyrroline 9f + Na]+.
9
Trimethyl (1
S
*,3
S
*,3a
R
*,4
S
*,7
R
*,7a
S
*)-4-[4-(Benzyl-oxy)phenylmethyl]-1-methyl-3-phenyl-2,3,3a,4,7,7a-hexahydro-1
H
-4,7-epoxyisoindole-1,3a,7a-tri-carboxy-late (7b)
Oil. 1H NMR (400 MHz, CDCl3): δ = 1.62 (s, 3 H), 1.96 (d, J = 14.8 Hz, 1 H), 2.37 (d, J = 14.8 Hz, 1 H), 3.63 (s, 3 H), 3.91 (s, 3 H), 3.94 (s, 3 H), 4.21 (br s, 1 H), 4.84 (br s, 1 H), 4.94 (s, 2 H), 5.71 (s, 1 H), 5.94 (d, J = 5.2 Hz, 1 H), 6.45 (d, J = 5.2 Hz, 1 H), 6.74 (d, J = 8.8 Hz, 2 H), 6.89 (d, J = 8.8 Hz, 2 H), 7.24-7.60 (m, 10 H). 13C NMR (100 MHz, CDCl3): δ = 21.3, 34.9, 51.7, 52.4, 52.6, 65.7, 69.2, 69.7, 69.9, 80.9, 83.0, 96.7, 113.9, 127.2, 127.6, 127.7, 128.2, 128.3, 130.3, 130.4, 130.8, 132.0, 136.9, 137.3, 145.4, 156.9, 169.3, 171.7, 171.9. IR (neat): 3450, 3062, 3032, 3003, 2951, 1744, 1726, 1654, 1611, 1511, 1454, 1434, 1249, 1225, 1079 cm-1. MS (ES+): m/z (%) = 274 (33), 334 (100), 598 (15) [M + H]+. HRMS (ES+): m/z calcd for C35H36O8N: 598.2435; found: 598.2453.
Trimethyl (2 S *,5 S *)-2-Methyl-5-phenyl-2,5-dihydro-1 H -pyrrole-2,3,4-tricarboxylate (9b) White solid; mp 62-63 °C. 1H NMR (400 MHz, CDCl3): δ = 1.66 (s, 3 H), 2.74 (br s, 1 H), 3.60 (s, 3 H), 3.80 (s, 3 H), 3.83 (s, 3 H), 5.35 (s, 1 H), 7.20-7.35 (m, 5 H). 13C NMR (100 MHz, CDCl3): δ = 24.8, 52.2, 52.4, 52.9, 69.0, 73.0, 127.4, 128.3, 128.4, 140.1, 140.9, 141.2, 163.5, 163.7, 172.9. IR (KBr): 3359, 2992, 2950, 2832, 1733, 1715, 1656, 1449, 1433, 1334, 1244, 1204 cm-1. MS (ES+): m/z (%) = 274 (74), 334 (77) [M + H]+, 356 (100) [M + Na]+. HRMS (ES+): m/z calcd for C17H19O6NNa: 356.1105; found: 356.1119.
11Trimethyl (2 S *,5 S *)-2-[4-(Benzoyloxy)phenylmethyl]-5-phenyl-2,5-dihydro-1 H -pyrrole-2,3,4-tricarboxylate (9f) Oil. 1H NMR (250 MHz, CDCl3): δ = 2.83 (br s, 1 H), 3.32 (s, 2 H), 3.54 (s, 3 H), 3.80 (s, 3 H), 3.90 (s, 3 H), 4.68 (br s, 1 H), 7.14 (d, J = 8.5 Hz, 2 H), 7.26-7.30 (m, 5 H), 7.42 (d, J = 8.5 Hz, 2 H), 7.46-7.52 (m, 2 H), 7.57-7.67 (m, 1 H), 8.20 (d, J = 7.0 Hz, 2 H). 13C NMR (62.9 MHz, CDCl3): δ = 42.5, 52.0, 52.5, 52.8, 69.1, 77.5, 121.1, 127.7, 128.1, 128.5, 128.6, 129.5, 130.0, 131.8, 133.1, 133.5, 140.4, 140.7, 141.1, 150.0, 162.7, 164.5, 165.0, 171.9. IR (neat): 3367, 3063, 3032, 3005, 2953, 2847, 1739, 1731, 1713, 1659, 1601, 1507, 1452, 1434, 1250, 1200, 1168, 1082, 1063, 1024 cm-1. MS (ES+): m/z (%) = 552 (100) [M + Na]+. HRMS (ES+): m/z calcd for C30H27O8NNa: 552.1629; found: 552.1628.
12Trimethyl (3 S *,4 S *,5 R *)-5-Phenyl-4,5-dihydro-3 H -pyrrole-2,3,4-tricarboxylate (10) Oil. 1H NMR (400 MHz, CDCl3): δ = 3.15 (s, 3 H), 3.76 (s, 3 H), 3.87 (dd, J = 9.2, 6.0 Hz, 1 H), 3.93 (s, 3 H), 4.72 (dd, J = 6.0, 2.4 Hz, 1 H), 5.86 (dd, J = 9.2, 2.4 Hz, 1 H), 7.05-7.08 (m, 2 H), 7.22-7.32 (m, 3 H). 13C NMR (100 MHz, CDCl3): δ = 51.8, 52.7, 52.9, 56.5, 56.6, 78.9, 127.4, 128.2, 128.3, 135.6, 161.9, 164.0, 170.0, 170.1. IR (neat): 3059, 3033, 3007, 2956, 2919, 2847, 1726, 1648, 1452, 1437, 1369, 1312, 1258, 1217, 1101 cm-1. MS (ES+): m/z (%) = 260 (100), 342 (82) [M + Na]+. HRMS (ES+): m/z calcd for C16H17O6NNa: 342.0948; found: 342.0955.
14Trimethyl (2 S *,5 S *)-1-(Phenylcarbamoyl)-5-phenyl-2,5-dihydro-1 H -pyrrole-2,3,4-tricarboxylate (11) White solid; mp 156-157 °C. 1H NMR (250 MHz, CDCl3): δ = 3.69 (s, 3 H), 3.86 (s, 3 H), 3.93 (s, 3 H), 5.60 (d, J = 3.0 Hz, 1 H), 5.96 (d, J = 3.0 Hz, 1 H), 6.76 (br s, 1 H), 6.99 (t, J = 8.6 Hz, 1 H), 7.14 (d, J = 7.6 Hz, 2 H), 7.19-7.22 (m, 2 H), 7.41-7.48 (m, 3 H), 7.72 (d, J = 7.2 Hz, 2 H). 13C NMR (62.9 MHz, CDCl3): δ = 52.3, 52.6, 52.9, 67.0, 69.3, 119.2, 123.2, 127.9, 128.6, 129.1, 129.2, 131.2, 136.5, 137.8, 140.6, 152.9, 161.8, 161.9, 169.5. IR (neat): 3365, 3033, 3007, 2956, 2919, 2847, 1749, 1726, 1646, 1541, 1447, 1434, 1363, 1333, 1279, 1247 cm-1. MS (ES+): m/z (%) = 461 (100) [M + Na]+. HRMS (ES+): m/z calcd for C23H22O7N2Na: 461.1319; found: 461.1328.
15X-ray Crystal Data of 9b C17H19NO6, M = 333.33, triclinic, space group P-1, Z = 2, a = 6.0095 (8) Å, b = 8.1268 (13) Å, c = 18.151 (3) Å, α = 78.363 (3)°, β = 89.035 (2)°, γ = 77.285 (3)°, V = 846.6 (2) Å3, d = 1.308 g/cm3, 3217 independent reflections were collected with MoKα radiation on Kappa X8 APEX II system. Data analysis was carried out with Bruker program SMART and SAINT,17 the structure was solved and refined by direct methods using SHELXTL program18 to R1 = 0.0572, wR2 = 0.1505. The supplementary crystallographic data can be obtained free of charge from the Cambridge Crystallographic Data Centre via www.ccdc.cam.uk/data_request/cif. Please quote reference number CDDC 630085.
17Bruker SMART and SAINT, Bruker AXS Inc., Madison, Wisconsin, USA, 1997.
18Bruker SHELXTL, Version 6.3.1, Bruker AXS Inc., Madison, Wisconsin, USA, 2004.