74571-32-7Relevant academic research and scientific papers
Efficient preparation of optically active (S)-(-)-3-methyl-γ-butyrolactone by catalytic asymmetric hydrogenation using chiral N-substituted pyrrolidinebisphosphine rhodium complexes
Takeda,Tachinami,Hosokawa,Aburatani,Inoguchi,Achiwa
, p. 2706 - 2708 (2007/10/02)
(S)-(-)-2-Methyl succinamic acid, which is a good precursor of (S)-(-)-3-methyl-γ-butyrolactone, can be prepared by homogeneous asymmetric hydrogenation of 2-methylene succinamic acid catalyzed by (2S,4S)-N-substituted-4-(diphenylphosphino)-2-[(diphenylphosphino)-meth yl]pyrrolidine-rhodium complexes. Various N-substituted pyrrolidine-bisphosphines were synthesized to find the optimum ligand for this purpose and to compare the effects of the N-substituents.
N-carbamoyl-4-diphenylphosphino-2-diphenylphosphinomethylpyrrolidines(CAPP). Efficient new chiral ligands for asymmetric hydrogenation
Ojima, Iwao,Yoda, Noriko
, p. 1051 - 1054 (2007/10/02)
A series of N-(N′-substituted carbamoyl)-4-diphenylphosphino-2-diphenylphosphinomethylpyrrolidines (CAPP) was prepared, which exhibited excellent stereoselectivity in the asymmetric hydrogenation of α-acetamidocinnamic acid derivatives and itaconic acid as chiral ligand of the rhodium(I) catalyst.
