Determination of the relative and absolute stereochemistry of sphingofungins A, B, C, and D
作者:VanMiddlesworth Frank、Claude Dufresne、Francine E. Wincott、Ralph T. Mosley、Kenneth E. Wilson
DOI:10.1016/s0040-4039(00)74115-3
日期:1992.1
The relative and absolute stereochemistry of positions 2, 3, 4, and 5 of the recently isolated sphingofungins has been determined as 2S, 3R, 4R, 5S by spectral analysis of the rigid bicyclic derivative 5, and enzymatic hydrolysis of 4 using a 2S specific acylase. These configurational assignments were confirmed by degradation and conversion of sphingofungin B to peracetyl deoxynojirimycin 6.
通过刚性双环衍生物5的光谱分析以及使用2S特异性的4的酶促水解作用,最近分离出的鞘氨醇单糖的2、3、4和5位的相对和绝对立体化学已确定为2S,3R,4R,5S。酰基转移酶。这些构型分配已通过降解和鞘氨醇单丁胺B转化为过乙酰基脱氧野oji霉素6证实。