Lewis Acid-Catalyzed Enantioselective 1,3-Dipolar Cycloadditions of Diazoalkane: Chiral Ligand/Achiral Auxiliary Cooperative Chirality Control
作者:Shuji Kanemasa、Toshio Kanai
DOI:10.1021/ja002670a
日期:2000.11.1
EVANS, DAVID A.;CHAPMAN, KEVIN T.;HUNG, DEBORAH TAN;KAWAGUCHI, ALAN T., ANGEW. CHEM., 99,(1987) N 11, 1197-1199
作者:EVANS, DAVID A.、CHAPMAN, KEVIN T.、HUNG, DEBORAH TAN、KAWAGUCHI, ALAN T.
DOI:——
日期:——
EVANS, D. A.;CHAPMAN, K. T.;BISAHA, J., J. AMER. CHEM. SOC., 110,(1988) N 4, 1238-1256
作者:EVANS, D. A.、CHAPMAN, K. T.、BISAHA, J.
DOI:——
日期:——
Intermediates useful in the preparation of halichondrin compounds and methods for preparing the same
申请人:BEIJING TIENYI LUFU PHARMATECH CO. LTD.
公开号:US20210163509A1
公开(公告)日:2021-06-03
The invention relates to intermediates useful in the preparation of halichondrin compounds, methods for preparing the same and use thereof, such as halichondrins, eribulin, or their analogs. The intermediates, the methods and use thereof are used for the synthesis of the C20-C26 fragment of halichondrin compounds. The raw materials in the synthetic route of the invention are cheap and easily obtained, the sources and the qualities of the raw materials are reliable. The choice of the methods useful in the synthesis of chiral central structures are based on the structural characteristics of the reactants, thus effectively improving the synthesis efficiency, reducing the difficulties and risks of product quality control, and avoiding the use of highly toxic and expensive organotin catalysts to significantly decrease costs and improve environmental friendliness.
Evans, David A.; Chapman, Kevin T.; Hung, Deborah Tan, Angewandte Chemie, 1987, vol. 99, # 11, p. 1197 - 1199
作者:Evans, David A.、Chapman, Kevin T.、Hung, Deborah Tan、Kawaguchi, Alan T.