1245746-96-6Relevant articles and documents
Organocatalytic asymmetric Mannich-type reaction of N-sulfonylimines with isocyanoacetate leading to optically active 2-imidazoline-4-carboxylates
Zhang, Zhen-Wei,Lu, Gui,Chen, Miao-Miao,Lin, Ning,Li, Yong-Bo,Hayashi, Tamio,Chan, Albert S.C.
experimental part, p. 1715 - 1721 (2010/10/04)
The first asymmetric Mannich-type reaction of methyl isocyanoacetate with N-sulfonylimines catalyzed by cinchona alkaloid derivatives yielded 2-imidazolines with high diastereoselectivities and good enantioselectivities (up to >99:1 dr and 70% ee). This reaction provided a convenient route to access various substituted 2-imidazoline-4-carboxylates and related α,β-diamino acids in high enantiomeric purities.