Chiral and flexible 2,4-pentanediol-tethered cyclopropanation of olefins with a carbenoid derived from a diazo ester to construct three stereogenic centers
作者:Takashi Sugimura、Atsushi Mori、Akira Tai、Takahiro Tei、Yasuhiro Sakamoto、Tadashi Okuyama
DOI:10.1016/s0957-4166(03)00034-x
日期:2003.4
2,4-Pentanediol-tethered cyclopropanation of an olefin with an internal carbenoid generated from a diazo ester proceeded smoothly to give a chiral adduct having three stereogenic centers under full stereocontrol. The high stereoselectivity was not affected by the structure of the olefinic portion, studied so far with six substrates. Conversion of the product cyclopropane to other optically active compounds
烯烃与由重氮酯生成的内部类胡萝卜素的2,4-戊二醇连接的环丙烷化反应平稳进行,得到在完全立体控制下具有三个立体中心的手性加合物。迄今为止,对六种底物的研究都表明,高立体选择性不受烯烃部分结构的影响。还报道了产物环丙烷向其他旋光化合物的转化。