Synthesis of novel 1-(2,3-dihydro-5H-4,1-benzoxathiepin-3-yl)-uracil and -thymine, and their corresponding S-oxidized derivatives
作者:M. del Carmen Núñez、Antonio Entrena、Fernando Rodríguez-Serrano、Juan A. Marchal、Antonia Aránega、Miguel Á. Gallo、Antonio Espinosa、Joaquín M. Campos
DOI:10.1016/j.tet.2005.07.065
日期:2005.10
On the basis of molecular variations on isosteric replacements from the prototype 1-(2,3-dihydro-5H- 1,4-benzodioxepin-3-yl)-5fluorouracil a series of 3-(2,3-dihydro-5H-4, 1-benzoxathiepin-3-yl)-uracil or -thymine O,N-acetals was prepared. The nature of the cis- and trans-sulfoxide isomers was established by means of their conformational analyses carried out with Sybyl and after comparing the theoretical results with the H-1 NMR responses of the target molecules. (RS)-3-(1,1-Dioxo-2,3-dihydro-5H-4,1-benzoxathiepin-3-yl)thymine and (IS*, 3S*)-1-(1-oxo-3,5-dihydro-2H-4,1-benzoxathiepin-3-yl)thymine were found to be inhibitors of the MCF-7 cell growth. (c) 2005 Elsevier Ltd. All rights reserved.