Syntheses of Stable α-Silyloxyepoxides and α-Chloroalkyl Silyl Ethers Derivatives of 3,10-Dioxa-5-azatricyclo[5.2.1.02,6]dec-4-enes
摘要:
The Diels-Alder adduct (+/-)-5 of furan to 1-cyanovinyl acetate was converted to (1RS,2RS,6RS,7SR,8SR,10RS)-10-)[(tert-butyl)dimethylsilyl]-oxy}-4-ethooxy (1) and -4-phenyl-3,9,11-trioxa-5-azatetracyclo[5.3.1.0(2,6).0(8,10)]-undec-4-ene (2). These compounds reacted with TiCl4 to afford stable (1RS,2RS,6RS,7SR,8SR,9SR)-9-{[(tert-butyl)dimethylsilyl]oxy)-9-chloro-4-ethoxy-3,10-dioxa-5-azatricyclo[5.2.1.0(2,6)]decan-8-ol (3) and (1RS,2RS,6RS, 7SR,8SR,9SR)-9-{[(tert-butyl)dimethylsilyl}-9-chloro-4-phenyl-3,10-di-oxa-5-azatricyclo[5.2.1.0(2,6]decan-8-ol (4), respectively.
Protected forms of exo-5-amino-exo-6-hydroxy-7-oxabicyclo [2.2.1]heptan-2-one and of exo-5-amino-endo-6-hydroxy-7-oxabicyclo [2.2.1]heptan-2-one can be obtained readily and with high stereoselectivity from exo-2-cyano-7-oxabicyclo[2.2.1] hept-5-en-2-yl acetate (±)-(7). The processes involve acid promoted rearrangements of N-carbonyl aziridines 10 [(1 RS, 2SR, 4RS,5RS,6SR)-6-cyano-8-oxa-3-azatricyclo[3.2.1.02,4] oct-6-yl acetate derivatives] derived from (±)-7.
Syntheses of Stable α-Silyloxyepoxides and α-Chloroalkyl Silyl Ethers Derivatives of 3,10-Dioxa-5-azatricyclo[5.2.1.0<sup>2,6</sup>]dec-4-enes
作者:Susy Allemann、Florent Yvergnaux、Pierre Vogel
DOI:10.1080/00397919408020773
日期:1994.4
The Diels-Alder adduct (+/-)-5 of furan to 1-cyanovinyl acetate was converted to (1RS,2RS,6RS,7SR,8SR,10RS)-10-)[(tert-butyl)dimethylsilyl]-oxy}-4-ethooxy (1) and -4-phenyl-3,9,11-trioxa-5-azatetracyclo[5.3.1.0(2,6).0(8,10)]-undec-4-ene (2). These compounds reacted with TiCl4 to afford stable (1RS,2RS,6RS,7SR,8SR,9SR)-9-[(tert-butyl)dimethylsilyl]oxy)-9-chloro-4-ethoxy-3,10-dioxa-5-azatricyclo[5.2.1.0(2,6)]decan-8-ol (3) and (1RS,2RS,6RS, 7SR,8SR,9SR)-9-[(tert-butyl)dimethylsilyl}-9-chloro-4-phenyl-3,10-di-oxa-5-azatricyclo[5.2.1.0(2,6]decan-8-ol (4), respectively.