Alkali Ion Exchanged Nafion as a Confining Medium for Photochemical Reactions†
作者:Selvanathan Arumugam、Lakshmi S. Kaanumalle、V. Ramamurthy
DOI:10.1562/2005-05-05-ra-515
日期:——
beads were used as microreactors to control the photochemical reaction pathways. Product selectivity in three unimolecular reactions, namely, the photo-Fries rearrangement of naphthyl esters, NorrishType I reaction of 1-phenyl-3-p-tolyl-propan-2-one and NorrishType I and TypeIIreactions of benzoin alkyl ethers were examined. The influence of cations over the photodimerization of acenaphthylene and
Photo-Fries reaction in water made selective with a capsule
作者:Lakshmi S. Kaanumalle、Corinne L. D. Gibb、Bruce C. Gibb、V. Ramamurthy
DOI:10.1039/b617022f
日期:——
The water soluble capsule formed by a deep cavity cavitand with eight carboxylic acid groups controls product distribution during photo-Fries rearrangement of naphthyl esters in water by restricting the mobility of primary singletradical pair.
Alkali metal ion controlled product selectivity during photorearrangements of 1-naphthyl phenyl acylates and dibenzyl ketones within zeolites
作者:M Warrier、Lakshmi S Kaanumalle、V Ramamurthy
DOI:10.1139/v03-041
日期:2003.6.1
acylates and dibenzyl ketones included in zeolites have been compared. 1-Naphthyl phenyl acylates while in solution produce eight photoproducts; within NaY it gives a single product. The selectivity is attributed to the restriction brought on the mobility of the primary radical pair by the alkali metal ions present in zeolites. Photochemistry of dibenzyl ketones within NaY reveals that the intersystem crossing
Photo-Fries Reactions of 1-Naphthyl Esters in Cation-Exchanged Zeolite Y and Polyethylene Media
作者:Weiqiang Gu、Manoj Warrier、V. Ramamurthy、Richard G. Weiss
DOI:10.1021/ja990818o
日期:1999.10.1
Cyclodextrin-mediated regioselective photo-Fries reaction of 1-naphthyl phenyl acylates
作者:Smriti Koodanjeri、Ajit R Pradhan、Lakshmi S Kaanumalle、V Ramamurthy
DOI:10.1016/s0040-4039(03)00422-2
日期:2003.4
1-Naphthyl phenyl acylates upon irradiation in solution yield eight products via beta-cleavage process. However, excitation of these molecules as included in gamma-cyclodextrin results in a single product (>95%). This medium dependent product selectivity is attributed to conformational and translational restrictions enforced on the reactant as well as intermediates by the cyclodextrin cavity. (C) 2003 Elsevier Science Ltd. All rights reserved.