Practical Synthesis of Phthalimides and Benzamides by a Multicomponent Reaction Involving Arynes, Isocyanides, and CO<sub>2</sub>/H<sub>2</sub>O
作者:Trinadh Kaicharla、Manikandan Thangaraj、Akkattu T. Biju
DOI:10.1021/ol500403x
日期:2014.3.21
Transition-metal-freemulticomponentreactionsinvolvingarynes and isocyanides with either CO2 or H2O have been reported. With CO2 as the third component, the reactions resulted in the formation of N-substituted phthalimides. The utility of water as the third component furnished benzamide derivatives in moderate to good yields. These reactions took place under mild conditions with broad scope.
A compound of the formula:
wherein
Ar is optionally substituted phenyl, etc. ; n is 0, 1 or 2;
R1 is hydogen atom, optionally substituted alkyl, etc. ; R2 and R3 are independently optionally substituted alkyl, etc. ;
R4 and R5 are independently hydrogen atom or optionally substituted alkyl; R6 is hydrogen atom, hydroxy or alkyl;
or a pharmaceutically acceptable salt thereof is useful as a medicament for treating retinal degenerative disorders and the like.