An asymmetric pericyclic cascade approach to 3-alkyl-3-aryloxindoles: generality, applications and mechanistic investigations
作者:Edward Richmond、Kenneth B. Ling、Nicolas Duguet、Lois B. Manton、Nihan Çelebi-Ölçüm、Yu-Hong Lam、Sezen Alsancak、Alexandra M. Z. Slawin、K. N. Houk、Andrew D. Smith
DOI:10.1039/c4ob02526a
日期:——
The reaction of l-serine derived N-arylnitrones with alkylarylketenes generates 3-alkyl-3-aryloxindoles in good yields and excellent enantioselectivities.
Stereocontrolled Creation of All-Carbon Quaternary Stereocenters by Organocatalytic Conjugate Addition of Oxindoles to Vinyl Sulfone
作者:Qiang Zhu、Yixin Lu
DOI:10.1002/anie.201003837
日期:2010.10.11
residues have been prepared (see scheme), and found to be very effective towards the asymmetric addition of 3‐alkyl‐oxindoles to 1,1‐bis(benzenesulfonyl)ethylene. This synthetic protocol has led to the enantioselective synthesis of 3‐alkyl‐3‐aryl‐disubstituted oxindoles and indolines with an all‐carbon quaternary stereogenic center.
An Asymmetric Hetero-Claisen Approach to 3-Alkyl-3-aryloxindoles
作者:Nicolas Duguet、Alexandra M. Z. Slawin、Andrew D. Smith
DOI:10.1021/ol901441t
日期:2009.9.3
The reaction of a chiral N-phenylnitrone derived from Garner's aldehyde with alkylarylketenes generates 3-alkyl-3-aryloxindoles directly in excellent yields and with good to excellent levels of enantioselectivity (up to 90% ee).