A Baker–Venkataraman retro-Claisen cascade delivers a novel alkyl migration process for the synthesis of amides

A simple extension of the carbamoyl Baker-Venkataraman rearrangement has been developed. If residual water in the reaction is not strictly excluded a Baker-Venkataraman retro-Claisen cascade takes place, giving amide products, in which an alkyl group apparently migrates between two functionalities of the substrate

Mechanism and Application of Baker–Venkataraman O→C Acyl Migration Reactions

This literature review focuses on the O→C acyl migration of aryl esters to yield the corresponding 1,3-dicarbonyl products—a reaction known as the Baker–Venkataraman rearrangement—and outlines their subsequent transformations. The purpose of the review is to highlight the utility of the rearrangement which provides a key step in the synthesis of various heterocyclic motifs. The scope of the Baker–Venkataraman rearrangement is illustrated by way of numerous examples of its application, and in doing so, the review contains over 100 references and covers just over 100 years of the literature, from the first report of the rearrangement by Auwers in 1910 up to more recent examples in the past few years. 1 Introduction 2 Historical Perspective 3 Mechanism 4 Applications: General Routes to Heterocycles 4.1 Flavones and Flavanones 4.2 Xanthones 4.3 Chromones 4.4 Coumarins 4.5 Anthrapyran and Anthracyclin Antibiotics 4.6 Benzopyrans 5 The Retro-Baker–Venkataraman Rearrangement 6 Summary and Outloo

Biology of the silver belly, Leiognathus bindus (Val). of the Calicut coast

The silver bellies constitute one of the important inshore fisheries of India. From All- India fish landings it is evident that there have been wide fluctuations in the magnitude of Leiognathus fisheries from1950 to 1953. Of the 7 species of Leiognathus known to occur in the inshore regions, only 6 species are of commercial importance ; even amongst these, L. bindus (Val.) locally called Nalla Mullen is the most abundant in the Malabar coast. A perusal of previous work Chidambaram and Venkataraman (19^6), Devanesan and Chidambaram (194.8), Bhimachar and Venkataraman (1952), Nayar (1958), Venkataraman (i960) and Anon ((962) revealed that very little information is available on the biology and fishery of L. bindus (Val.) a commercially important species. Therefore, it was felt desirable to investigate in detail the biology and fishery of this species at Calicut from 1956 to 1958

Book review : Entrepreneurship in emerging regions around the world : theory, evidence and implications

P.H. Phan, S. Venkataraman and S.R. Velamuri (2008) Entrepreneurship in emerging regions around the world: Theory, evidence and implications, Edward Elgar, Cheltenham, United Kingdom<br /