Facile Entry into Triazole Fused Heterocycles via Sulfamidate Derived Azido-alkynes
作者:V. Sai Sudhir、N. Y. Phani Kumar、R. B Nasir Baig、Srinivasan Chandrasekaran
DOI:10.1021/jo9016748
日期:2009.10.2
Direct synthesis of condensed triazoles from diverse sulfamidates by ring opening of sulfamidates with sodium azide followed by one-pot propargylation and cycloaddition furnished title compounds. The methodology in general has been demonstrated on diverse sulfamidates derived from amino acids, amino acid derivatives, and carbohydrates to obtain diverse triazole fused scaffolds. In one example, a condensed
Herein we present a simple and highly efficient method for the synthesis of beta and gamma-amino thiols via regioselective ring opening of sulfamidates with tetrathiomolybdate 1. The generality of this methodology has been shown by synthesizing carbohydrate derived beta-amino thiol. The scope and versatility of this methodology has been demonstrated by synthesizing biologically important unnatural amino acids like isocysteines in optically pure form. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of Unnatural Selenocystines and β-Aminodiselenides via Regioselective Ring-Opening of Sulfamidates Using a Sequential, One-Pot, Multistep Strategy
作者:Nasir Baig Rashid Baig、R. N. Chandrakala、V. Sai Sudhir、Srinivasan Chandrasekaran
DOI:10.1021/jo1001388
日期:2010.5.7
high yield from sulfamidates under mild reaction conditions using potassium selenocyanate and benzyltriethylammonium tetrathiomolybdate ([BnNEt3]2MoS4) in a sequential, one-pot, multistep reaction. The tolerance of multifarious protecting groups under the reaction conditions is discussed. The methodology was successfully extended to the synthesis of selenocystine, 3,3′-dialkylselenocystine, and 3,3′-
在一个连续的,一锅多步的多步反应中,使用硒氰酸钾和四硫代钼酸苄基三乙铵([BnNEt 3 ] 2 MoS 4),在温和的反应条件下,由氨基磺酸盐高产率地合成了各种N-烷基-β-氨基二硒化物。讨论了反应条件下多种保护基的耐受性。该方法已成功扩展到硒代胱氨酸,3,3'-二烷基硒代胱氨酸和3,3'-二苯基异硒代胱氨酸的合成及其直接掺入肽中。