Alcohol-based Michaelis–Arbuzov reaction: an efficient and environmentally-benign method for C–P(O) bond formation
作者:Xiantao Ma、Qing Xu、Huan Li、Chenliang Su、Lei Yu、Xu Zhang、Hongen Cao、Li-Biao Han
DOI:10.1039/c8gc00931g
日期:——
The famous Michaelis–Arbuzovreaction is extensively used both in the laboratory and industry to manufacture tons of widely-used organophosphoryl compounds every year. However, this method and the modified Michaelis–Arbuzovreactions developed recently still have some limitations. We now report a new alcohol-version of the Michaelis–Arbuzovreaction that can provide an efficient and environmentally-benign
Copper-Catalyzed Dehydrative Cyclization of 1-(2-Hydroxyphenyl)propargyl Alcohols with P(O)H Compounds for the Synthesis of 2-Phosphorylmethylbenzofurans
A tetrakis(acetonitrile)copper(I) hexafluorophosphate [Cu(MeCN)PF6]‐catalyzed dehydrative reaction of 1‐(2‐hydroxyphenyl)propargyl alcohols with diarylphosphine oxides has been developed to provide an efficient synthesis of phosphorylated benzofurans in good to high yields. In the presence of a catalytic amount of an organic base, a variety of H‐phosphonates and H‐phosphinates can also be employed
A new protocol for the dearylation of arylphosphine oxides was developed using sodium hydride (NaH) in the presence of lithium iodide (LiI). The transient sodium phosphinite could be functionalized with a range of electrophiles in a one-pot fashion.
Phosphinative cyclopropanation of allyl phosphates with lithium phosphides
作者:Ryo Shintani、Ayase Ohzono、Kentaro Shirota
DOI:10.1039/d0cc04854b
日期:——
A new cyclopropanation reaction of allylphosphates with lithium phosphides has been developed to give cyclopropylphosphines through the formation of both a C–P bond and a cyclopropane ring at the same time, and high selectivity toward cyclopropanation over allylic substitution has been realized by conducting the reaction in the presence of HMPA.