SCHMID, RUDOLF;HANSEN, HANS-JURGEN, HELV. CHIM. ACTA, 73,(1990) N, C. 1258-1275
作者:SCHMID, RUDOLF、HANSEN, HANS-JURGEN
DOI:——
日期:——
Synthesis of Optically Active Bifunctional Isoprenoid Building Blocks by Rhodium(I)-Catalyzed Asymmetric Allylamine to Enamine Isomerization
作者:Rudolf Schmid、Hans-J�rgen Hansen
DOI:10.1002/hlca.19900730516
日期:1990.8.8
The application of the known asymmetric allylamine to enamine isomerization methodology to bifunctional C5-isoprenoid allylic amines of types IId and IIe (Scheme 1) is described. It is shown that a number of such substrates can be isomerized with enantioselectivities of > 90% ee. using cationie Rh1 complexes containing (6. 6′-dimethylbiphenyl′2, 2′-diyl)bis(dipheny phosphine) (BIPHEMP; 9) as asymmetry-inducing