Relay Catalytic Branching Cascade: A Technique to Access Diverse Molecular Scaffolds
作者:Nitin T. Patil、Valmik S. Shinde、Balasubramanian Sridhar
DOI:10.1002/anie.201208738
日期:2013.2.18
Skeletal diversity: The reactions of alkynoic acids (A, common type of substrates) with various scaffold‐building agents (B) under gold catalysis produce a series of multifunctional polyheterocyclic structures (see scheme). The approach enables the preparation of compound libraries with high skeletal diversity.
Electrophile induced branching cascade: a powerful approach to access various molecular scaffolds and their exploration as novel anti-mycobacterial agents
作者:Nitin T. Patil、Ashok Konala、Sudha Sravanti、Ashita Singh、Ramesh Ummanni、Balasubramanian Sridhar
DOI:10.1039/c3cc45289a
日期:——
Herein we report on the Electrophile Induced BranchingCascade (EIBC), a new technique to produce a variety of biologically important molecularscaffolds. Some compounds exhibit excellent activities against Mycobacterium smegmatis.
Catalyst-Dependent Selectivity in the Relay Catalytic Branching Cascade
作者:Avinash H. Bansode、Aslam C. Shaikh、Rahul D. Kavthe、Shridhar Thorat、Rajesh G. Gonnade、Nitin T. Patil
DOI:10.1002/chem.201405736
日期:2015.2.2
One of the best ways to access collections of small molecules is to use various techniques in diversity‐oriented synthesis (DOS). Recently, a new form of DOS, namely “relaycatalyticbranchingcascades” (RCBCs), has been introduced, wherein a common type of starting material reacts with several scaffold‐building agents (SBAs) to obtain structurally diversemolecularscaffolds under the influence of
A chiral phosphoric acid-catalyzed enantioselective synthesis of spiro[indoline-3,6′-indolo[1,2-c]quinazolin]-2-ones has been developed by condensation/N-alkylation cascade from 2-(1H-indolyl)anilines and isatins, affording the spiro aminals with quaternary stereogenic centers with up to 93% ee. The protocol could be expanded to 2-(3,5-dimethyl-1H-pyrrol-2-yl)aniline and a variety of pyrrole-derived
通过2-/ (1H-吲哚基)缩合/ N-烷基化级联反应,开发了手性磷酸催化的螺[吲哚啉-3,6'-吲哚[1,2- c ]喹唑啉] -2-酮的对映选择性合成。苯胺和isatins,为螺旋螺旋动物提供了高达93%ee的四级立体生成中心。该方案可以扩展为2-(3,5-二甲基-1 H-吡咯-2-基)苯胺,并且还获得了多种吡咯衍生的螺手性缩醛胺,收率高(71–91%),具有出色的对映选择性(89%-94%ee)。