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.
A metal- and base-free domino protocol for the synthesis of 1,3-benzoselenazines, 1,3-benzothiazines and related scaffolds
作者:V. P. Rama Kishore Putta、Raghuram Gujjarappa、Ujjawal Tyagi、Prasad P. Pujar、Chandi C. Malakar
DOI:10.1039/c8ob03058h
日期:——
Efficient and operationally simple protocols have been demonstrated for the synthesis of the title compounds using easily available starting materials under mild conditions, giving a broad range of rarely reported molecules in excellent yields.
New selenium-containing heterocyclic compounds, 6H-1,3,5-oxaselenazines, have been synthesized stereoselectively by the reaction of selenoamides with aldehydes in the presence of borontrifluoride etherate complex.
Carbene-catalyzed enantioselective seleno-Michael addition as access to antimicrobial active Se-containing heterocycles
作者:Hongyan Long、Sha Zhao、Chunyan Jian、Xiuli Wu、Fengfei Lu、Minghong Liao、Fengrui Che、Xingxing Wu、Yonggui Robin Chi
DOI:10.1007/s11426-023-1909-5
日期:2024.7
Organoseleniums exhibit a diverse set of biological activities that are pivotal for drug discovery and are widely explored in synthetic chemistry and material science. While many transformations have been developed for non-enantioselective C–Se bond formations, the catalyst-controlled stereoselective preparation of chiral organoseleniums continues to be of considerable challenge. In particular, there
Synthesis utilizing reducing ability of carbon monoxide. A new method for synthesis of selenocarboxamides: reaction of nitriles with selenium, carbon monoxide, and water