Seleno- and sulpheno-lactonisation reactions of 5,7-dienoic acids
作者:Michael R Huckstep、Richard J.K Taylor、Michael P.L Caton
DOI:10.1016/s0040-4039(00)85362-9
日期:1986.1
The seleno- and sulpheno-lactonisation reactions of 5,7-octadienoic acid (1) and 5,7-nonadienoic acid (2) have been studied as a means of preparing functionalised lactones; δ-lactone formation occurs in all cases but whereas octadienoic acid (1) undergoes only 1,4-addition across the diene unit the outcome of the corresponding reactions of nonadienoic acid (2) depends on the choice of the electrophilic
The preparation of octahydro leukotrienes C, D, and E via a stereoselective sulfenyllactonization reaction
作者:Robert N. Young、William Coombs、Yvan Guindon、Joshua Rokach、Diane Ethier、Ronald Hall
DOI:10.1016/s0040-4039(01)92385-8
日期:1981.1
Sulfenyl halides derived from the N-trifluoroacetamido methyl ester derivatives of cysteine, cysteinyiglycine and glutathione react stereoselectively with (5E)- and (5Z)-eicosenoic acids to provide, after separation of diastereomers and hydrolysis of the protecting groups, the fully saturated analogues of leukotrienes LTC4, LTD4, and LTE4.