Synlett 2015; 26(10): 1398-1402
DOI: 10.1055/s-0034-1380676
letter
© Georg Thieme Verlag Stuttgart · New York

Efficient and Catalyst-Free Michael Addition of d-Glucosamines to Acetylenic and Vinylic Compounds: Access to Vinylogous Carbamates of d-Glucosamine Derivatives

Arun Sharma
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttarakhand, India   Email: rkpedfcy@iitr.ac.in   Email: ramakpeddinti@gmail.com
,
Jyoti Agarwal
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttarakhand, India   Email: rkpedfcy@iitr.ac.in   Email: ramakpeddinti@gmail.com
,
Naresh Babu Kamatham
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttarakhand, India   Email: rkpedfcy@iitr.ac.in   Email: ramakpeddinti@gmail.com
,
Rama Krishna Peddinti*
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttarakhand, India   Email: rkpedfcy@iitr.ac.in   Email: ramakpeddinti@gmail.com
› Author Affiliations
Further Information

Publication History

Received: 17 February 2015

Accepted after revision: 02 April 2015

Publication Date:
11 May 2015 (online)


Abstract

An efficient, catalyst-free methodology has been developed for the Michael addition reaction between d-glucosamine derivatives and various Michael acceptors. All reactions proceeded smoothly at room temperature to furnish novel sugar-derived vinylogous carbamates in high chemical yields and excellent stereoselectivity.

Supporting Information

 
  • References and Notes

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    • 1d Ernst B, Magnani JL. Nat. Rev. 2009; 661
    • 1e Mastsuo I, Ito Y. US 7879766 B2, 2011
  • 3 Suri M, Jousseaume T, Neumann JJ, Glorius F. Green Chem. 2012; 14: 2193
  • 8 Huan QL, Yin L, Hai LZ. Bioorg. Med. Chem. 2011; 19: 4454
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  • 13 Experimental Procedure A solution of a d-glucosamine derivative (14, 0.2 mmol) and a Michael acceptor (59, 0.2 mmol) in MeOH (1 mL) was stirred for the given period of time at r.t. After completion of the reaction, the solution was concentrated under reduced pressure and the crude mixture was subjected to silica gel column chromatography eluting with EtOAc–hexanes (5:95 to 20:80) to obtain pure products 1013 (solid products 10a,d,e were obtained in pure form after workup without column chromatography). Data for selected compounds are given below. Methyl 2-Deoxy-2[(Z)-1,2-dimethoxycarbonylvinyl)]-amino-4,6-O-(phenylmethylene)-α-d-glucopyranoside (10a) Yield 80 mg (94%), light yellow solid, mp 143–144 °C. IR (KBr): νmax = 2892, 2919, 1731, 1665, 1605, 1455, 1366, 1265, 1214, 1120, 1050, 913, 860, 741, 699 cm–1. 1H NMR (500 MHz, CDCl3): δ = 8.20 (d, J = 10.0 Hz, 1 H, NH), 7.48–7.44 (m, 2 H), 7.37–7.33 (m, 3 H), 5.51 (s, 1 H), 5.20 (s, 1 H), 4.83 (d, J = 3.5 Hz, 1 H), 4.32–4.26 (m, 1 H), 4.08 (dt, J = 3.5, 10.0 Hz, 1 H), 3.92 (t, J = 9.5 Hz, 1 H), 3.83–3.81 (m, 4 H), 3.74 (t, J = 10.5 Hz, 1 H), 3.69 (s, 3 H) 3.48 (s, 3 H), 3.08 (s, 1 H) ppm. 13C NMR (125 MHz, CDCl3): δ = 170.3, 164.4, 151.4, 137.1, 129.1, 128.2, 126.2, 101.8, 99.5, 89.8, 81.6, 71.3, 68.9, 62.4, 57.6, 55.7, 52.7, 50.9 ppm. ESI+-HRMS: m/z calcd for [C20H25NO9 + Na]+: 446.1421; found: 446.1406. Methyl 2-Deoxy-2[(Z)-1,2-diethoxycarbonylvinyl)]amino-4,6-O-(phenylmethylene)-α-d-glucopyranoside (10b) Yield 90 mg (99%), yellowish viscous liquid. IR (KBr): νmax = 3440, 2978, 2925, 1728, 1665, 1608, 1465, 1378, 1268, 1220, 1139, 1086, 1043, 991, 860, 760, 691, 604 cm–1. 1H NMR (500 MHz, CDCl3): δ = 8.18 (d, J = 10.0 Hz, 1 H, NH), 7.48–7.44 (m, 2 H), 7.37–7.33 (m, 3 H), 5.52 (s, 1 H), 5.22 (s, 1 H), 4.83 (d, J = 4.0 Hz, 1 H) 4.31–4.25 (m, 3 H), 4.19–4.12 (m, 2 H), 4.08 (dt, J = 4.0, 10.0 Hz, 1 H), 3.92 (t, J = 6.5 Hz, 1 H), 3.84 (dt, J = 5.0, 10.0 Hz, 1 H), 3.74 (t, J = 11.5 Hz, 1 H) 3.48 (s, 3 H), 2.89 (br, 1 H), 1.33 (t, J = 7.5 Hz, 3 H), 1.27 (t, J = 7.0 Hz, 3 H) ppm. 13C NMR (125 MHz, CDCl3): δ = 169.9, 163.9, 151.6, 137.1, 129.1, 128.2, 126.2, 101.8, 99.6, 90.0, 81.6, 71.2, 68.9, 62.5, 61.9, 59.5, 57.8, 55.7, 14.3, 13.9 ppm. ESI+-HRMS: m/z calcd for [C22H29NO9 + H]+: 452.1915; found: 452.1915. Methyl 2-Deoxy-2[(Z)-2-ethoxycarbonylvinyl)]amino-4,6-O-(phenylmethylene)-α-d-glucopyranoside (10c) Yield 50 mg (65%), yellowish viscous liquid. IR (KBr): νmax = 3423, 2925, 2854, 1660, 1593, 1448, 1386, 1216, 1104, 1050, 909, 739, 697 cm–1. 1H NMR (500 MHz, CDCl3): δ = 7.90 (t, J = 11.5 Hz, 1 H, NH), 7.57–7.33 (m, 5 H), 6.68 (dd, J = 13.0, 8.0 Hz, 1 H), 5.54 (s, 1 H), 4.75 (d, J = 3.2 Hz, 1 H), 4.52 (d, J = 8.0 Hz, 1 H), 4.30 (dd, J = 11.5, 5.0 Hz, 1 H), 4.15–4.07 (m, 2 H), 3.96 (t, J = 9.0 Hz, 1 H), 3.87–3.80 (m, 1 H), 3.74 (t, J = 11.5 Hz, 1 H), 3.53–3.47 (m, 1 H), 3.45 (s, 3 H), 3.15 (dt, J = 9.5, 3.5 Hz, 1 H), 1.25 (t, J = 7.5 Hz, 3 H) ppm. 13C NMR (100 MHz, CDCl3): δ = 170.8, 151.7, 137.0, 129.1, 128.2, 126.2, 101.9, 99.5, 83.1, 83.1, 70.6, 68.8, 63.6, 62.4, 62.3, 58.8, 55.6, 14.4 ppm. ESI+-HRMS: m/z calcd for [C19H25NO7 + Na]+: 402.1523; found: 402.1533. 2-Deoxy-2[(Z)-2-dimethoxycarbonylvinyl)]amino-1,3,4,6-tetra-O-benzyl-α-d-glucopyranoside (12a) Yield 134 mg (99%), yellowish viscous liquid. IR (KBr): νmax = 3852, 3734, 3473, 3408, 2917, 2860, 1730, 1660, 1617, 1552, 1495, 1365, 1278, 1226, 1100, 1069, 908, 743, 691 cm–1. 1H NMR (500 MHz, CDCl3): δ = 8.09 (d, J = 10.0 Hz, 1 H, NH), 7.37–7.23 (m, 18 H), 7.17–7.14 (m, 2 H), 5.21 (s, 1 H), 4.85–4.76 (m, 4 H), 4.64–4.50 (m, 4 H), 4.24–4.15 (m, 2 H), 3.77–3.68 (m, 3 H), 3.67 (s, 3 H), 3.57 (s, 3 H), 3.52–3.40 (m, 2 H) ppm. 13C NMR (125 MHz, CDCl3): δ = 170.5, 163.6, 152.6, 138.0, 136.7, 128.3, 128.3, 128.1, 128.0, 127.9, 127.7, 127.6, 127.6, 127.5, 127.4, 101.2, 89.3, 84.0, 77.7, 74.9, 74.9, 74.7, 73.4, 70.7, 68.7, 58.8, 52.1, 50.6 ppm. ESI+-HRMS: m/z calcd for [C40H43NO9 + Na]+: 704.2830; found: 704.2822. 2-Deoxy-2[(propionitrile)]amino-1,3,4,6-tetra-O-benzyl-β-d-glucopyranoside (13d) Yield 82 mg (60%) as a yellowish viscous liquid. IR (KBr): νmax = 3284, 2918, 2858, 1381, 1101, 980, 753, 699 cm–1. 1H NMR (500 MHz, CDCl3): δ = 7.40–7.22 (m, 18 H), 7.18–7.09 (m, 2 H), 4.96–4.84 (m, 3 H), 4.81 (d, J = 10.5 Hz, 1 H), 4.71 (d, J = 12.0 Hz, 1 H), 4.64 (d, J = 11.0 Hz, 1 H), 4.56–4.48 (m, 3 H), 3.86–3.60 (m, 5 H), 2.82 (s, 2 H), 2.75 (d, J = 9.5 Hz, 1 H), 2.37–2.30 (m, 2 H) ppm. 13C NMR (125 MHz, CDCl3): δ = 138.6, 138.0, 137.8, 137.0, 128.4, 128.4, 128.3, 128.2, 127.9, 127.8, 127.8, 127.7, 127.6, 127.5, 118.6, 96.6, 82.3, 78.4, 75.7, 74.9, 73.4, 70.7, 69.2, 68.4, 62.1, 43.5, 19.5 ppm. ESI+-HRMS: m/z calcd for [C37H40N2O5 + Na]+: 615.2834; found: 615.2825. 2-Deoxy-2[(but-3-en-2-one)]amino-1,3,4,6-tetra-O-benzyl-α-d-glucopyranoside (13e) Yield 93 mg (77%), yellowish viscous liquid. IR (KBr): νmax = 3433, 3031, 2922, 2858, 1955, 1876, 1727, 1638, 1565, 1486, 1454, 1356, 1291, 1112, 936, 911, 806, 743, 698 cm–1. 1H NMR (500 MHz, CDCl3): δ = 9.88 (t, J = 12.0 Hz, 1 H, NH), 7.46–7.40 (m, 2 H), 7.38–7.23 (m, 16 H), 7.19–7.12 (m, 2 H), 6.66 (dd, J = 7.5, 13.0 Hz, 1 H), 5.04 (d, J = 7.5 Hz, 1 H), 4.97 (d, J = 3.5 Hz, 1 H), 4.80 (d, J = 11.0 Hz, 1 H), 4.71 (t, J = 6.5 Hz, 2 H), 4.65–4.55 (m, 3 H), 4.49 (d, J = 11.0 Hz, 2 H), 3.81 (t, J = 9.5 Hz, 2 H), 3.73 (dd, J = 3.5, 10.5 Hz, 1 H), 3.66 (t, J = 9.5 Hz, 1 H), 3.60 (dd, J = 1.5, 10.5 Hz, 1 H), 3.19 (dt, J = 3.5, 10.0 Hz, 1 H), 2.10 (s, 3 H) ppm. 13C NMR (125 MHz, CDCl3): δ = 169.9, 163.0, 151.6, 137.2, 129.1, 128.2, 126.2, 101.9, 99.6, 90.0, 81.6, 71.2, 68.9, 62.5, 61.9, 59.5, 57.8, 55.7, 14.3, 13.9 ppm. ESI+-HRMS: m/z calcd for [C38H41NO6 + Na]+: 630.2826; found: 630.2837.