Multifold ring closing metathesis reactions in the formation of resorcin[4]arene cavitands
作者:Sumedh Parulekar、Kirankirti Muppalla、Ali Husain、Kirpal S. Bisht
DOI:10.1039/c5ra00760g
日期:——
the resorcin[4]arene cavitandsusing the ring closing metathesis reaction (RCM) in perallylated resorcin[4]arenes was investigated. The formation of resorcinarene cavitands offers unique molecular platforms for host–guest chemistries, sensor development, metal complexation, as well as new polymers and self-assembled systems, and as potential reaction sites, and novel catalytic platforms. In this manuscript
Synthesis of a novel resorcin[4]arene–glucose conjugate and its catalysis of the CuAAC reaction for the synthesis of 1,4-disubstituted 1,2,3-triazoles in water
作者:Ali A. Husain、Kirpal S. Bisht
DOI:10.1039/c9ra00972h
日期:——
transfer catalyst for the CuAAC in water as a green approach for the synthesis of 1,4-disubstituted 1,2,3-triazole species. The catalytic utility of RG (1 mol%) was demonstrated in a multicomponent one-pot CuAAC for various azido/alkyne substrates. The RG acts as a molecular host and a micro-reactor resulting in the 1,4-disubstituted 1,2,3-triazoles in excellent yield.
A new [4]carceplex, and a crystal structure and dynamic combinatorial chemistry of a [5]carceplex
作者:Jianyu Sun、Brian O. Patrick、John C. Sherman
DOI:10.1016/j.tet.2008.11.110
日期:2009.8
A new [4]carceplex (2-guest) is reported. It is composed of two cavitands linked by four disulfide bonds. It forms twistomers, which interconvert on a millisecond timescale. The energy barrier for interconversion of twistomers is guest-dependent. Formation of [4]carceplex 2-guest is template dependent. The selectivity in templates is flat relative to most previous related template work. Larger kin [5]carceplex 1.guests were reinvestigated. A crystal structure confirms the twist between the hemispherical cavitands. Use of a redox buffer allowed dynamic combinatorial chemistry to be performed between pairs of templates. (C) 2009 Elsevier Ltd. All rights reserved.