Regioselective Prins Cyclization of Allenylsilanes. Stereoselective Formation of Multisubstituted Heterocyclic Compounds
摘要:
The Prins cyclization of hydroxy or amino group-containing allenylsilanes with carbonyl compounds occurred at the allenic terminus in a regio- and stereoselective manner to give the di- or trisubstituted tetrahydrofurans, tetrahydropyrans, and pyrrolidines. During the reaction, the allenic axial chirality of the starting material was efficiently transferred to the newly formed carbon chiral centers of the product.
Regioselective Prins Cyclization of Allenylsilanes. Stereoselective Formation of Multisubstituted Heterocyclic Compounds
摘要:
The Prins cyclization of hydroxy or amino group-containing allenylsilanes with carbonyl compounds occurred at the allenic terminus in a regio- and stereoselective manner to give the di- or trisubstituted tetrahydrofurans, tetrahydropyrans, and pyrrolidines. During the reaction, the allenic axial chirality of the starting material was efficiently transferred to the newly formed carbon chiral centers of the product.
Enantioselective Synthesis of Allenes by Catalytic Traceless Petasis Reactions
作者:Yao Jiang、Abdallah B. Diagne、Regan J. Thomson、Scott E. Schaus
DOI:10.1021/jacs.6b11937
日期:2017.2.8
Allenes are useful functional groups in synthesis as a result of their inherent chemical properties and established reactivity patterns. One property of chemical bonding renders 1,3-substituted allenes chiral, making them attractive targets for asymmetric synthesis. While there are many enantioselective methods to synthesize chiral allenes from chiral starting materials, fewer methods exist to directly