A divergent and metal free synthesis of sulfoximine tethered imidazoles, imidazopyridines, imidazothiazoles, imidazobenzothiazines, thiazoles and selenazoles
作者:S. R. K. Battula、V. P. Rama Kishore Putta、G. V. Subbareddy、I. E. Chakravarthy、V. Saravanan
DOI:10.1039/c7ob00601b
日期:——
A divergent and metal free approach has been successfully developed for the synthesis of sulfoximine tethered heterocycles. A key α-bromoalkanone intermediate 3b has been reported for the first time. Various sulfoximine tethered imidazoles, imidazopyridines, thiozoloimidazoles, imidazobenzothiazines, thiazoles and selenazoles are made from this common sulfoximine building block.
Aliphatic and aromaticprimaryselenoamides 2 were isolated by the reaction of the corresponding aliphatic and aromatic nitriles with potassium 4-methylselenobenzoate in the presence of BF3·Et2O in moderate from high yields.
Synthesis of Primary Arylselenoamides by Reaction of Aryl Nitriles with Woollins' Reagent
作者:Guoxiong Hua、Yang Li、Alexandra M. Z. Slawin、J. Derek Woollins
DOI:10.1021/ol062053c
日期:2006.11.9
[Structure: see text] The reaction of aryl nitriles with Woollins' reagent followed by water affords a variety of primary arylselenoamides in 60-100% yield. The first crystal structures of two primary selenoamides are reported.
Synthesis of Primary Selenocarboxamides and Conversion of Alkyl Selenocarboxamides into Selenazoles
作者:Long-Li Lai、David H. Reid
DOI:10.1055/s-1993-25959
日期:——
Nitriles react with sodium hydrogen selenide, pyridine and hydrochloric acid in ethanol to give primary aryl and alkyl selenocarboxamides. The alkyl selenocarboxamides are converted into selenazoles by reaction with phenacyl bromide.