Asymmetric induction in the coupling of 5,6-dihydro-1,4-dithiins with chiral aldehydes. A new synthetic approach to polyhydroxylated compounds
作者:Romualdo Caputo、Luigi Longobardo、Giovanni Palumbo、Silvana Pedatella、Federico Giordano
DOI:10.1016/0040-4020(96)00677-1
日期:1996.9
polyhydroxyl compounds (and/or carbohydrates) by coupling of 5,6-dihydro-1,4-dithiins - carrying a vinylic hydrogen atom - with chiral aldehydes and, in sequence, stereoselective removal of the dithiodimethylene dithiin bridge and stereospecific hydroxylation of the resulting polyhydroxyl alkenes. In this paper the study of both coupling and desulfurization steps is reported by the use of 2-phenyl-5,6-dihydro-1
设计了一种新的策略,通过将带有乙烯基氢原子的5,6-二氢-1,4-二硫辛与手性醛偶联,然后依次选择性地立体选择性地去除二硫代二亚甲基二硫辛来合成多羟基化合物(和/或碳水化合物)所得多羟基烯烃的桥连和立体有择羟基化。在本文中,通过使用2-苯基-5,6-二氢-1,4-二硫精(5)作为模型化合物与三种手性醛3a,b的反应,报道了偶联步骤和脱硫步骤的研究。和4。