Fast Ruthenium-Catalysed Allylation of Thiols by Using Allyl Alcohols as Substrates
作者:Alexey B. Zaitsev、Helen F. Caldwell、Paul S. Pregosin、Luis F. Veiros
DOI:10.1002/chem.200900192
日期:2009.6.22
Green and fast: Allylation of aromatic and aliphatic thiols, by usingallylalcohols as substrates, requires only minutes at ambient temperature with a Ru catalyst (see scheme). Quantitative conversion is normal and the catalyst possesses high functional‐group tolerance.
Enantioselective Allylic Thioetherification: The Effect of Phosphoric Acid Diester on Iridium‐Catalyzed Enantioconvergent Transformations
作者:Markus Roggen、Erick M. Carreira
DOI:10.1002/anie.201202092
日期:2012.8.20
You'll take the high road and I'll take the low road: Enantioenriched allylic thioethers have been synthesized from chiral racemic allylic alcohols. The combination of an Ir–(P,alkene) complex and dibutyl phosphoricacid are required to attain high selectivities. Mechanistic studies uncover an enantioconvergenttransformation in which substrate enantiomers react along different pathways to give the
LEWIS ACID-PROMOTED REACTION OF 2-ALKOXY-3,5-DINITROPYRIDINES WITH THIOLS. A NEW METHOD FOR THE SYNTHESIS OF UNSYMMETRICAL SULFIDES
作者:Teruaki Mukaiyama、Takashi Masui、Toshio Izawa
DOI:10.1246/cl.1976.1177
日期:1976.11.5
2-Alkoxy-3,5-dinitropyridines, easily prepared from 2-fluoro-3,5-dinitropyridine and alcohols react with various thiols in the presence of Lewis acids to give the corresponding unsymmetrical sulfides in good yields.
It was found that sodium salt of 1,2-benzisothiazole-3(2H)-thione 1,1-dioxide (thiosaccharin) readily reacted with alkyl halide affording 3-(alkylthio)-1,2-benzisothiazole 1,1-dioxide (3). Treatment of 3 with piperidine produces the corresponding alkanethiol in situ quantitatively and subsequent treatment with various electrophiles gives the corresponding sulfides and thiocarboxylic S-esters in good yields.
A facile TfOH-catalyzed oxidative cyclization of allyl compounds and isocyanide has been developed with the assistance of DDQ, where isocyanide is used as the crucial "N" and "CN" sources. Highly functionalized 2-cyanopyrroles are constructed efficiently through a new formal [3 + 2] mode, demonstrating diverse reactivity and synthetic utility in organic chemistry. 2-Cyanopyrrole is converted into a