19627-30-6Relevant articles and documents
Solvent-free and selective tosylation of alcohols and phenols with p-toluenesulfonyl chloride by heteropolyacids as highly efficient catalysts
Fazaeli, Razieh,Tangestaninejad, Shahram,Aliyan, Hamid
, p. 812 - 818 (2007/10/03)
Tosylation of some alcohols and phenols has been directly carried out with p-toluenesulfonyl chloride using heterodoxy acids (H3PW 12O40, H3PMo12O40, A 3PW12O40, and AlPMo12O40) as catalysts in the absence of solvent. We found that heteropoly acids AlPW12O40 and AlPMo 12O40 were effective catalysts for the tosylation of alcohols and phenols. In the case of aliphatic alcohols, secondary alcohols undergo tosylation chemoselectively in the presence of primary hydroxyl groups. This new method consistently has the advantage of excellent yields and short reaction time.
Diastereoselective α Allylation of Secondary and Tertiary Thioamides via Thio-Claisen Rearrangement. A Structural Proof of Z Secondary Thioamide Dianions and Z Tertiary Thioamide Anions
Tamaru, Y.,Furukawa, Y.,Mizutani, M.,Kitao, O.,Yoshida, Z.
, p. 3631 - 3639 (2007/10/02)
Highly diastereoselective α allylation of secondary and tertiary thioamides is achieved by making use of thio-Claisen rearrangement.From the correlation between the diastereoselectivities in products and the structures of allylating agents, the Z structures of secondary thioamide dianion (ca. 100percent Z) and tertiary thioamide anion (>97percent Z) are concluded.
