Substitution of the allylic moiety of azatrienes by functionalized alkyl groups permits high chemical yields and stereoselectivity during I.M.D.A cyclization. Substituted hydroisoindoles, precursors for natural and pharmaceutical products were prepared with good yields and selectivity.
GUY, A.;LEMAIRE, M.;GRAILLOT, Y.;NEGRE, M.;GUETTE, J. P., TETRAHEDRON LETT., 28,(1987) N 26, 2969-2972
作者:GUY, A.、LEMAIRE, M.、GRAILLOT, Y.、NEGRE, M.、GUETTE, J. P.
DOI:——
日期:——
Diastereocontrolled synthesis of pyrrolidines by nickel promoted tandem cyclization-quenching of aminobromodienes
作者:Yolanda Cancho、Joan M. Martín、María Martínez、Amadeu Llebaria、Josep M. Moretó、Antonio Delgado
DOI:10.1016/s0040-4020(97)10220-4
日期:1998.2
aminobromodienes has been extended to the synthesis of 2,3,4-trisubstituted pyrrolidines. By a judicious choice of substituents on the starting aminohalodiene, the diastereoselectivity of the process can be efficiently controlled. When a chiral auxiliary on the nitrogen atom is used, enantiomerically enriched pyrrolidines can be obtained after removal of the auxiliary.