Aqueous-Phase One-Pot Synthesis of 2-Aminothiazole- or 2-Aminoselenazole-5-carboxylates from β-Keto Esters, Thiourea or Selenourea, and <i>N</i>-Bromo-succinimide under Supramolecular Catalysis
作者:Kakulapati Rao、Mendu Narender、Majjigapu Somi Reddy、Vydyula Kumar、Boga Srinivas、Regati Sridhar、Yadavalli Nageswar
DOI:10.1055/s-2007-990849
日期:2007.11
2-Amino-4-alkyl- and 2-amino-4-arylthiazole-5-carboxylates and their selenazole analogues were synthesized by α-halogenation of β-keto esters with N-bromosuccinimide, followed by cyclization with thiourea or selenourea, respectively, in the presence of β-cyclodextrin in water at 50 °C.
2-氨基-4-烷基-和2-氨基-4-芳基噻唑-5-羧酸盐及其硒唑类似物是通过用N-溴代琥珀酰亚胺对β-酮酯进行α-卤化合成的,然后分别用硫脲或硒脲环化,在 50 °C 的水中存在 β-环糊精。