Synlett 2006(9): 1407-1409  
DOI: 10.1055/s-2006-939716
LETTER
© Georg Thieme Verlag Stuttgart · New York

π-Allyl Palladium Complexes as Efficient and Powerful Alternative for Nucleophilic Substitution on Bicyclo[3.1.0]hexane Sulfonates: Regio-, Chemo- and Stereoselectivity

Frédéric Lecornuéb, Florence Charnay-Pougeta, Jean Ollivier*a
a Synthèse Organique et Méthodologie, UMR 8182, Institut de Chimie Moléculaire et des Matériaux d"Orsay, Bât. 420, Université Paris-Sud, 91405 Orsay, France
Fax: +33(1)69156278; e-Mail: jollivie@icmo.u-psud.fr;
b Synthèse et Réactivité des Substances Naturelles, Département de Chimie, SFA-UMR 6514, Université Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers, France
Further Information

Publication History

Received 14 February 2006
Publication Date:
22 May 2006 (online)

Abstract

The preparation of cyclopropylidene bicyclo[3.1.0]hexane derivatives has been performed on both exo- and endo-bicyclo[3.1.0]hexane sulfonates, through nucleophilic substitution via π-allyl palladium complexes. While the endo- and exo-configurations do not particularly affect the selectivities of the products, on the other hand, the ‘hard’ or ‘soft’ nature of nucleophiles dramatically enhances the conservation or not of the integrity of the cyclopropane rings.

5

6-Azido-1-vinylcyclohex-1-ene ( 15)
1H NMR (250 MHz, CDCl3): δ = 6.33 (dd, J = 17.7, 10.9 Hz, 1 H), 6.06 (t, J = 3.9 Hz, 1 H), 5.30 (d, J = 17.7 Hz, 1 H), 5.08 (d, J = 10.9 Hz, 1 H), 4.12 (br s, 1 H), 2.32-2.00 (m, 3 H), 1.81-1.65 (m, 3 H). 13C NMR (63 MHz, CDCl3): δ = 137.4, 134.2, 132.8, 111.8, 53.9, 29.0, 25.4, 17.4. IR (neat): 2943, 2100, 1643 cm-1. MS (EI): m/z (%) = 149 (4) [M+], 120 (31), 93 (69), 91 (66), 79 (100), 77 (35). HRMS: m/z calcd for C8H11N3: 149.0952; found; 149.0950.

8

2-Vinylcyclohex-2-en-1-yl formate ( 16)
1H NMR (250 MHz, CDCl3): δ = 8.09 (s, 1 H), 6.22 (dd, J = 17.5, 11.0 Hz, 1 H), 6.08 (t, J = 5.4 Hz, 1 H), 5.81 (m, 1 H), 5.09 (d, J = 17.5 Hz, 1 H), 4.98 (d, J = 11.0 Hz, 1 H), 2.35-1.80 (m, 3 H), 1.80-1.60 (m, 3 H). 13C NMR (90 MHz, CDCl3): δ = 160.6, 136.8, 135.1, 133.4, 111.5, 64.8, 28.5, 25.5, 17.0. IR (neat): 2945, 1718, 1647 cm-1. MS (EI): m/z (%) = 106 (95), 91 (100), 79 (35), 78 (45). MS (CI, NH3): m/z (%) = 170 (100) [M+ + 18]. HRMS (ES+):
m/z calcd for C15H22O4Na: 289.1410; found: 289.1416.

10

Diethyl (2-Vinylcyclohex-2-en-1-yl)malonate ( 18)
1H NMR (360 MHz, CDCl3): δ = 6.21 (dd, J = 17.6, 11.2 Hz, 1 H), 5.87 (t, J = 4.0 Hz, 1 H), 5.11 (d, J = 17.6 Hz, 1 H), 4.91 (d, J = 11.2 Hz, 1 H), 4.19 (q, J = 7.2 Hz, 2 H), 4.09 (q, J = 7.2 Hz, 2 H), 3.62 (d, J = 7.9 Hz, 1 H), 3.31 (m, 1 H), 2.25-2.10 (m, 2 H), 1.90-1.65 (m, 4 H), 1.28 (t, J = 7.2 Hz, 3 H), 1.24 (q, J = 7.2 Hz, 3 H). 13C NMR (63 MHz, CDCl3): δ = 159.6, 138.6, 131.1, 114.3, 61.3, 61.1, 55.0, 54.8, 33.0, 25.7, 25.2, 18.0, 14.1, 13.9. IR (neat): 2936, 1732, 1641 cm-1. MS (EI): m/z (%) = 175 (20), 161 (67), 160 (78), 133 (44), 119 (20), 115 (24), 106 (100), 91 (93), 79 (25), 78 (34). MS (CI, NH3): m/z (%) = 267 (100) [M+ + 1], 284 (52) [M+ + 18]. HRMS (ES+): m/z calcd for C15H22O4Na: 289.1417; found: 289.1416.

11

Diethyl (2-Bicyclo[3.1.0]hex-6-ylideneethyl)malonate ( 19)
1H NMR (360 MHz, CDCl3): δ = 5.70 (t, J = 6.6 Hz, 1 H), 4.18 (q, J = 7.2 Hz, 4 H), 3.46 (t, J = 7.5 Hz, 1 H), 2.71 (dd, J = 7.2, 6.6 Hz, 2 H), 1.92-1.65 (m, 8 H), 1.28 (t, J = 7.1 Hz, 3 H), 1.26 (t, J = 7.1 Hz, 3 H). 13C NMR (63 MHz, CDCl3): δ = 173.0, 132.9, 115.2, 61.3, 52.0, 31.0, 29.6, 29.4, 21.2, 20.7, 20.5, 14.0. IR (neat): 2938, 2863, 1750, 1733 cm-1. MS (EI): m/z (%) = 175 (37), 161 (20), 147 (37), 119 (100), 118 (44), 117 (27), 106 (51), 105 (20), 101 (33), 92 (27), 91 (81), 79 (31). MS (CI, NH3): m/z (%) = 267 (67) [M+ + 1], 284 (100) [M+ + 18]. HRMS (ES+): m/z calcd for C15H22O4Na: 289.1417; found: 289.1415.

13

N -(2{(1 R ,5 S )-Bicyclo[3.1.0]hex-6-ylidene}ethyl)-4-methyl- N -[(1 R )-1-phenylethyl] Benzenesulfonamide ( 21)
1H NMR (250 MHz, CDCl3): δ = 7.73 (d, J = 7.0 Hz, 4 H), 7.35-7.20 (m, 14 H), 5.52 (t, J = 6.5 Hz, 1 H, minor), 5.48 (t, J = 6.5 Hz, 1 H, major), 5.26 (q, J = 7.0 Hz, 1 H, major), 5.21 (q, J = 7.0 Hz, 1 H, minor), 3.90 (t, J = 6.5 Hz, 1 H, minor), 3.85 (t, J = 6.5 Hz, 1 H, major), 3.73 (d, J = 6.5 Hz, 1 H, major), 3.68 (d, J = 6.5 Hz, 1 H, minor), 2.45 (s, 6 H), 1.80-1.60 (m, 16 H), 1.49 (d, J = 7.0 Hz, 3 H, minor), 1.47 (d, J = 7.0 Hz, 3 H, major). 13C NMR (63 MHz, CDCl3): δ = 142.8, 140.3 (major), 140.2 (minor), 138.8 (major), 138.6 (minor), 136.8, 133.1, 131.9, 129.5, 129.2, 128.1, 128.0, 127.7, 127.5, 127.3, 127.1, 117.3 (major), 117.2 (minor), 55.5 (minor), 55.3 (major), 45.6 (minor), 45.3 (major), 29.5 (major), 29.3 (minor), 21.5 (minor), 21.3 (major), 20.9, 20.5, 17.6 (minor), 17.1 (major). IR (neat): 2939, 2863, 1599 cm-1. MS (EI): m/z (%) = 381 (3.4) [M+], 276 (20), 207 (100), 155 (21), 120 (23), 105(69), 91 (33), 79 (20). HRMS: m/z calcd for C23H27NO2S: 381.1757; found: 381.1752.