作者:Allan Rossini、Luiz Dias
DOI:10.21577/0103-5053.20190126
日期:——
This work describes the preparation of the C(7)-C(20) fragment of spirotoamides A to C in a very elegant fashion, achievement very high levels of stereocontrol. The synthesis has been accomplished by a sequence involving 14 steps (0.36% overall yield, average of 81% for each step) in high diastereo and enantioselectivity, employing, as determining steps, asymmetric Mukaiyama and boron-mediated 1,5-anti promoted aldol reactions between alpha-methyl-beta-hydroxyketones and aldehydes.