Facial selectivity in the 4 + 2 reactions of a diene derived from carvone
作者:Christopher F. Morrison、Jamie P. Vaters、David O. Miller、D. Jean Burnell
DOI:10.1039/b516675f
日期:——
substituents were assessed in 4 + 2 reactions with N-phenylmaleimide, tetracyanoethylene and 4-phenyl-1,2,4-triazoline-3,5-dione. The only adducts were those arising by attack of the dienophile on the face of the diene opposite the isopropenyl or isopropyl group. In spite of some mechanistic similarities that tetracyanoethylene and 4-phenyl-1,2,4-triazoline-3,5-dione might have with the 4 + 2 addition