Organocatalytic Approach to Polysubstituted Piperidines and Tetrahydropyrans
摘要:
Polysubstituted piperidines and tetrahydropyrans are synthesized from aldehydes and two classes of trisubstituted nitroolefins via an O-TMS protected diphenylprolinol catalyzed domino Michael addition/aminalization (or acetalization) process. This approach allows formation of four contiguous stereocenters in the piperidine or tetrahydropyran ring in one step with excellent enantioselectivity.
Organocatalytic and Scalable Synthesis of the Anti-Influenza Drugs Zanamivir, Laninamivir, and CS-8958
作者:Junshan Tian、Jiankang Zhong、Yunsheng Li、Dawei Ma
DOI:10.1002/anie.201408138
日期:2014.12.8
Zanamivir, laninamivir, and CS‐8958 are three neuraminidase inhibitors that have been clinically used to combat influenza. We report herein a novel organocatalytic route for preparing these agents. Only 13 steps are needed for the assembly of zanamivir and laninamivir from inexpensive D‐araboascorbic acid by this synthetic route, which relies heavily on a thiourea‐catalyzed enantioselective Michael
NOVEL AZA-OXO-INDOLES FOR THE TREATMENT AND PROPHYLAXIS OF RESPIRATORY SYNCYTIAL VIRUS INFECTION
申请人:Hoffmann-La Roche Inc.
公开号:US20160068531A1
公开(公告)日:2016-03-10
The invention provides novel compounds having the general formula:
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, W
1
, W
2
, W
3
, A and X are as described herein, compositions including the compounds and methods of using the compounds.