Physical Properties and Various Reactions of Thionitrites and Related Substances
作者:Shigeru Oae、K\={o}ichi Shinhama、Ken Fujimori、Yong Hae Kim
DOI:10.1246/bcsj.53.775
日期:1980.3
Several new sulfonyl or sulfonyl derivativives, thionitrates (RSNO2), sulfonyl nitrites (RSO2NO), were successfully isolated by treating corresponding thiols and sulfinic acids with dinitrogen tetraoxide (N2O4). Spectroscopic data of both stable and many rather unstable compounds were determined and compared with those of corresponding alkyl nitrites (RONO) or alkyl nitrates (RONO2). Chemical reactivities
(Alkylthio)alkynes as Addends in the Co(0) Catalyzed Intramolecular Pauson-Khand Reaction. Substituent Driven Enhancements of Annulation Efficiency and Stereoselectivity
作者:Brian L. Pagenkopf、David B. Belanger、Donogh J. R. O'Mahony、Tom Livinghouse
DOI:10.1055/s-2000-6301
日期:——
Compared to terminal alkynes, (methylthio)alkynes are generally superior substrates for the thermally promoted, Co2(CO)8 catalyzed Pauson-Khand reaction of enynes and allenynes, providing enones in higher yields and with enhanced diastereoselectivity. Improvements in yield dependent upon the use of 2,2,2-trifluoroethanol as co-solvent and an apparent preference for endo selectivity with (ethoxy)alkynes are also disclosed.
Regioselective Cobalt-Catalyzed Addition of Sulfides to Unactivated Alkenes
作者:Vinay Girijavallabhan、Carmen Alvarez、F. George Njoroge
DOI:10.1021/jo201016z
日期:2011.8.5
A novel method to synthesize tertiary alkyl/arylsulfides in a mild and regioselective manner from unactivated alkenes using cobalt catalysis is described. The methodology is compatible with sensitive functionalities and is successful with several different types of alkenes and sulfides.
Neighboring tin effect in the oxidation of α-stannyl phenyl vinyl sulfides
作者:Richard S. Glass、Qin Guo、Yunqi Liu
DOI:10.1016/s0040-4020(97)00559-0
日期:1997.8
catalyzed by Pd(PPh3)4. The regio- and stereochemistry of the products was determined unequivocally in three cases by X-raycrystallographic structure studies and in the others by1H NMR spectroscopic analysis. The irreversible oxidation potentials of these compounds were determined in acetonitrile and dichloromethane by cyclic voltammetry. The oxidation potentials provide evidence for significant interaction
通常通过Pd(PPh 3)4催化硫代乙炔的加氢苯乙烯化反应制得α-苯乙烯基乙烯基硫化物。在三种情况下通过X射线晶体学结构研究确定了产物的区域和立体化学,在其他情况下则通过1 H NMR光谱分析确定了产物的区域和立体化学。通过循环伏安法测定乙腈和二氯甲烷中这些化合物的不可逆氧化电位。氧化电位提供了在具有适当几何形状的情况下CSnσ键与硫3p孤对轨道之间显着相互作用的证据。
CHIRAL CONTROL
申请人:WAVE LIFE SCIENCES PTE. LTD.
公开号:US20150211006A1
公开(公告)日:2015-07-30
The present invention relates to chirally controlled oligonucleotides, chirally controlled oligonucleotide compositions, and the method of making and using the same. The invention specifically encompasses the identification of the source of certain problems with prior methodologies for preparing chiral oligonucleotides, including problems that prohibit preparation of fully chirally controlled compositions, particularly compositions comprising a plurality of oligonucleotide types. In some embodiments, the present invention provides chirally controlled oligonucleotide compositions. In some embodiments, the present invention provides methods of making chirally controlled oligonucleotides and chirally controlled oligonucleotide compositions.