The present invention relates to a diazaspiro compound and a use thereof. The diazaspiro compound may be significantly advantageously used as a monomer for producing a polyimide film having excellent optical properties.
First Kilogram-Scale Application of the Lanthanum Catalyzed Asymmetric Amination to Synthesis of the Chiral Succinimide Derivative, A Key Intermediate for the Preparation of AS-3201
作者:Minoru Toshima、Shoji Watanabe、Katsuya Uchiyama、Tsuyoshi Takasaki、Nandkumar N. Bhogle、Hang Zhao、Mike Filios、Kazuhiko Takahashi、John R. Snoonian、Kostas Saranteas
DOI:10.1021/acs.oprd.6b00053
日期:2016.7.15
ethyl-(R)-3-amino-2,5-dioxopyrrolidine-3-carboxylate (2), the chiral intermediate for the manufacture of AS-3201 (1), is described. A practical and scalable Shibasaki asymmetric amination that generates the chiral quaternary center was developed and demonstrated on kilogram scale. A safe, convenient, and large-scale hydrogenation of the hydrazine intermediate was also developed.
NOVEL DIAZASPIROALKANES AND THEIR USE FOR TREATMENT OF CCR8 MEDIATED DISEASES
申请人:Borjesson Lena
公开号:US20090156575A1
公开(公告)日:2009-06-18
The invention provides compounds of general formula
wherein A, B, p, w, x, y, and z are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.