A Convenient Method for the Synthesis of Dialkyl Ethers by Alkylation of Alcohols Using Phosphinimidates in the Presence of a Catalytic Amount of Trimethylsilyl Triflate
作者:Hidenori Aoki、Teruaki Mukaiyama
DOI:10.1246/bcsj.79.1255
日期:2006.8
An alkylation reaction of alcohols with alkyl N-(methylsulfonyl)diphenylphosphinimidates proceeded smoothly in the presence of a catalytic amount of trimethylsilyl triflate (Me3SiOTf) in DME at roo...
Cyanation of various alcohols by a new type of oxidation–reduction condensation is described. Primary alkyl diphenylphosphinites, 2,6-dimethyl-1,4-benzoquinone (DMBQ), and diethyl cyanophosphonate ...
Preparation of Various Carboxylic Acid Esters from Bulky Alcohols and Carboxylic Acids by a New Type Oxidation-reduction Condensation Using 2,6-Dimethyl-1,4-benzoquinone
A new-type oxidation-reduction condensation by using 2,6-dimethyl-1,4-benzoquinone (DMBQ), carboxylic acids and in situ formed alkoxydiphenylphosphines (1) including the bulky alkoxy group-substituted ones proceeded smoothly to afford the corresponding carboxylic acidesters in good to high yields. Alkoxydiphenylphosphines were formed in situ by treating either N,N-dimethylaminodiphenylphosphine (Ph2PNMe2)
Water determines the products: an unexpected Brønsted acid-catalyzed PO–R cleavage of P(<scp>iii</scp>) esters selectively producing P(O)–H and P(O)–R compounds
作者:Chunya Li、Qi Wang、Jian-Qiu Zhang、Jingjing Ye、Ju Xie、Qing Xu、Li-Biao Han
DOI:10.1039/c9gc01254k
日期:——
selectivity of Brønsted acid-catalyzed C–O cleavage reactions of trialkylphosphites: with water, the reaction quickly takes place at room temperature to afford quantitative yields of H-phosphonates; without water, the reaction selectively affords alkylphosphonates in high yields, providing a novel halide-free alternative to the famous Michaelis–Arbuzov reaction. This method is general as it can be readily