Syntheses Of (±)-Raikovenal, (±)-Preraikovenal, and (±)-Epiraikovenal
作者:Barry B. Snider、Qing Lu
DOI:10.1080/00397919708006097
日期:1997.5
(+/-)-Raikovenal (1a) has been synthesized in five steps from dihydrofilifolone (3) by two Wittig reactions. A similar sequence provides (+/-)-preraikovenal Epiraikovenal (1b) has been prepared by photolysis of preraikovenal or by photolysis of 5 to give 4b. Lewis acid induced cyclization of enal 5 gives cyclopentylideneacetaldehyde 16 rather than bicyclo[3.2.0]heptanecarboxaldehyde 4.