Stereoselective Synthesis of 1,3-Amino Alcohols by the Pd-Catalyzed Cyclization of Trichloroacetimidates
作者:Yuanzhen Xie、Kai Yu、Zhenhua Gu
DOI:10.1021/jo402681z
日期:2014.2.7
The synthesis of 4-vinyl-5,6-dihydro-1,3-oxazines, precursors of 1,3-amino alcohols, using the palladium-catalyzed cyclization of trichloroacetimidates is reported. The reaction favors the formation of the 4,6-cis-isomers with up to >20:1 diastereoselectivity. Chemoselective hydrolysis of the resulting 5,6-dihydro-1,3-oxazines was also investigated.
据报道,使用钯催化的三氯乙酰亚氨酸酯的环化反应,合成了1,3-氨基醇的前体4-乙烯基-5,6-二氢-1,3-恶嗪。该反应有利于形成具有高达> 20:1的非对映选择性的4,6-顺式异构体。还研究了所得5,6-二氢-1,3-恶嗪的化学选择性水解。