The synthesis of isochroman-4-ols and isochroman-3-ols: models for naturally occurring benzo[g]isochromanols
作者:Charles B de Koning、Ivan R Green、Joseph P Michael、José R Oliveira
DOI:10.1016/s0040-4020(01)00963-2
日期:2001.11
The synthesis of isochromanes containing hydroxy substituents at the 4- and 3-positions has been achieved. The key step for the synthesis of the isochroman-4-ols entailed an oxidative mercury mediated ring closure of 2-(prop-1-enyl)phenylmethanol derivatives, while in the synthesis of the isochroman-3-ols the key step involved ozonolysis of 2-(prop-2-enyl)phenylmethanol derivatives. (C) 2001 Elsevier Science Ltd. All rights reserved.
Application of intramolecular carbonyl-ene reaction towards the synthesis of idarubicinone scaffold
作者:Shyam Basak、Sutapa Ray、Dipakranjan Mal
DOI:10.24820/ark.5550190.p009.921
日期:——
facile access to the tetracyclic idarubicinone core. The required key dihydroxyanthraquinone aldehyde precursor was assembled in one step by modified Hauser annulation of a functionalized benzoquinone. Its ene reaction in the presence of SnCl4·5H2O directly led to the formation of idarubicinone core. Also described are an unprecedented thermal cascade involving a thermal ICE en route to α-naphthols, and