A simple nickel catalyst converts terminal alkynes and formic acid to α-chiral carboxylic acids in high enantioselectivity. The reaction proceeds via the hydrocarboxylation of alkynes and enantioselective transfer hydrogenation of acrylic acids.
Catalytic Asymmetric Synthesis of Unprotected β<sup>2</sup>-Amino Acids
作者:Chendan Zhu、Francesca Mandrelli、Hui Zhou、Rajat Maji、Benjamin List
DOI:10.1021/jacs.1c00249
日期:2021.3.10
Importantly, both aromatic and aliphatic β2-amino acids can be obtained using this method. Mechanistic studies are consistent with the aminomethylation to proceed via silylium-based asymmetriccounteranion-directedcatalysis (Si-ACDC) and a transition state to explain the enantioselectivity is suggested on the basis of density functional theory calculation.
MACROCYCLIC INHIBITORS OF THE PD-1/PD-L1 AND CD80(B7-1)/PD-L1 PROTEIN/PROTEIN INTERACTIONS
申请人:Bristol-Myers Squibb Company
公开号:US20140294898A1
公开(公告)日:2014-10-02
The present disclosure provides novel macrocyclic peptides which inhibit the PD-1/PD-L1 and PD-L1/CD80 protein/protein interaction, and thus are useful for the amelioration of various diseases, including cancer and infectious diseases.
Chartreusin derivatives, salts thereof, antitumorous compositions containing the same, and processes for produing the same
申请人:ISHIHARA SANGYO KAISHA, LTD.
公开号:EP0159708A2
公开(公告)日:1985-10-30
This invention relates to a novel chartreusin derivative of the general formula (I):
and a salt thereof. This chartreusin derivative and a salt thereof have an excellent antitumor activity, which is exhibited even when the site of cancer inoculation and the site of drug administration are different. This invention further relates to a antitumorous composition containing the above-mentioned compound as active ingredient. This invention furthermore relates to a process for producing the above-mentioned chartreusin derivative or salt thereof.
Chartreusin derivatives, salts thereof, antitumorous compositions containing the same, and processes for producing the same
申请人:ISHIHARA SANGYO KAISHA, LTD.
公开号:EP0219852A2
公开(公告)日:1987-04-29
This invention relates to a novel chartreusin derivative of the general formula (I):
and a salt thereof. This chartreusin derivative and a salt thereof have an excellent antitumor activity, which is exhibited even when the site of cancer inoculation and the site of drug administration are different. This invention further relates to a antitumorous composition containing the above-mentioned compound as active ingredient. This invention furthermore relates to a process for producing the above-mentioned chartreusin derivative or salt thereof.