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.
Organocatalytic Approach to Polysubstituted Piperidines and Tetrahydropyrans
作者:You Wang、Shaolin Zhu、Dawei Ma
DOI:10.1021/ol200004s
日期:2011.4.1
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.
Enantioselective 1,3-Dipolar Cycloaddition Using (Z)-α-Amidonitroalkenes as a Key Step to the Access to Chiral cis-3,4-Diaminopyrrolidines
作者:Eduardo García-Mingüens、Marcos Ferrándiz-Saperas、M. de Gracia Retamosa、Carmen Nájera、Miguel Yus、José M. Sansano
DOI:10.3390/molecules27144579
日期:——
amino group in the β-position was studied using several chiral ligands and silversalts. The optimized reactionconditions were directly applied to the study of the scope of the reaction. The determination of the absolute configuration was evaluated using NMR experiments and electronic circular dichroism (ECD). The reduction and hydrolysis of both groups was performed to generate in an excellent enantiomeric
使用几种手性配体和银盐研究了亚氨基酯和在 β 位带有掩蔽氨基的( Z )-硝基烯烃之间的对映选择性 1,3-偶极环加成反应。优化后的反应条件直接应用于反应范围的研究。使用 NMR 实验和电子圆二色谱 (ECD) 评估绝对构型的确定。进行这两个基团的还原和水解以以优异的对映体比率生成相应的顺式-2,3-二氨基脯氨酸。