作者:Arthur G. Schultz、Theodore H. Fedynyshyn
DOI:10.1016/0040-4020(82)80247-0
日期:1982.1
effect cyclobutene ring opening in the 3-heterobicyclo[3.2.0]hept-6-ene ring system. We report the unexpected rearrangement of 4a, 4b, 13b and 13c to the synthetically useful a-vinyl-2,5-dihydrothiophenes 7a, 7b, 15a and 15b, respectively. Conversion of 4a to 6 is suggested to occur by a 1,3-rearrangement of 4a to isomeric 3-thiabicyclo[3.2.0]hept-6-ene 19 followed by cyclobutene ring opening in 19
针对二氢噻吩1b 1b的合成的研究已经阐明了影响3-杂双环[3.2.0]庚-6-烯环系统中环丁烯开环的几种因素。我们报告了4a,4b,13b和13c的意外重排,分别可用于合成有用的α-乙烯基-2,5-二氢噻吩7a,7b,15a和15b。建议通过4a的1,3-重排为异构的3-thiabicyclo [3.2.0] hept-6-ene 19来实现4a到6的转化。随后在19中打开环丁烯开环。