TABER, D. F.;KREWSON, K. R.;RAMAN, K.;RHEINGOLD, A. L., TETRAHEDRON LETT., 1984, 25, N 46, 5283-5286
作者:TABER, D. F.、KREWSON, K. R.、RAMAN, K.、RHEINGOLD, A. L.
DOI:——
日期:——
Enantioselective construction of alicyclic bicyclo[3.1.0]hexane framework by double stereodifferentiation and its application for the synthesis of both enantiomers of vitamin D3 CD ring synthons
reaction was catalyzed by a chiral bis-oxazoline copper (l) complex 17. The absolute stereochemistry of each generated diastereomer (10f and 11f) was elucidated. Both enantiomers of the vitaminD3 CD ring synthons ((−)-21 and (+)-22) were synthesized from (−)-12 and (+)-13, respectively.
(±)-Dehydroiridodiol and its epimer (±)-isodehydroiridodiol were synthesized stereoselectively using the homoconjugate addition of cyanide anion to methyl 6-methyl-2-oxobicyclo[3.1.0]hexane-1-carboxylates. Both enantiomers of dehydroiridodiol were prepared after the resolution of l-menthyl 6-methyl-2-oxobicyclo[3.1.0]hexane-1-carboxylate, whose absolute configurations became clear as the result.