One-Pot Double-Annulation Strategy for the Synthesis of Unusual Fused Bis-Heterocycles
作者:Shukree Abdul-Rashed、Georgios Alachouzos、William W. Brennessel、Alison J. Frontier
DOI:10.1021/acs.orglett.0c01351
日期:2020.6.5
A novel metal-free double-annulation cascade for the construction of unusual fused heterocyclic systems is described. This simple protocol enables the sequential assembly of two rings in one pot from two simple precursors. Acidic conditions promote the condensation and the intramolecular alkynyl Prins reaction of an enyne or arenyne alcohol with a cyclic hemiaminal to form a five-, six-, or seven-membered
Rhodium-Catalyzed Asymmetric Hydroformylation of N-Allylamides: Highly Enantioselective Approach to β2-Amino Aldehydes
作者:Xiaowei Zhang、Bonan Cao、Shichao Yu、Xumu Zhang
DOI:10.1002/anie.201000955
日期:2010.6.1
You′re having a lahf! The asymmetrichydroformylation (AHF) of allylic compounds, catalyzed by a rhodium–yanphos complex, is a direct and concise route to β2‐amino aldehydes, acids, and alcohols with excellent enantioselectivity (see scheme; TON=turnover number, acac=acetylacetonate).
你在做饭!的不对称加氢甲酰基烯丙基化合物(AHF),由铑- yanphos配合物催化,是对β的直接和简明路线2 -氨基醛,酸,和具有优异的对映选择性醇(参见方案; TON =周转数,ACAC =乙酰)。