A chiral synthesis of L-acosamine and L-daunosamine via an enantioselective intramolecular[3 + 2]cycloaddition
作者:Peter M. Wovkulich、Milan R. Uskokovic
DOI:10.1021/ja00403a071
日期:1981.7
USKOKOVIC, M. R.;WOVKULICH, P. M.
作者:USKOKOVIC, M. R.、WOVKULICH, P. M.
DOI:——
日期:——
Total synthesis of acosamine and daunosamine utilizing a diastereoselective intramolecular [3+2] cycloaddition
作者:P.M. Wovkulich、M.R. Uskoković
DOI:10.1016/s0040-4020(01)96700-6
日期:1985.1
acosamine (4) has been accomplished via a diastereoselective intramolecular nitrone-olefin cyclization. In the key step the chiral nitrone 12a cyclized to give two isoxazolidines 13a and 14a in an 82:18 ratio. Further elaboration of 13a led to daunosamine and acosamine. The effects of olefin substitution on the diastereoselectivity of the cycloaddition was also examined.