[5 + 1] Cycloaddition of <i>C,N</i>-Cyclic <i>N</i>′-Acyl Azomethine Imines with Isocyanides
作者:Takahiro Soeta、Kaname Tamura、Yutaka Ukaji
DOI:10.1021/ol2034542
日期:2012.3.2
A catalyst-free [5 + 1] cycloaddition reaction between isocyanides and C,N-cyclic N′-acyl azomethineimines as the “isocyanophile” leading to novel heterocycles has been developed. These reactions proceeded quickly and cleanly to afford the corresponding imin-1,3,4-oxadiazin-6-one derivatives in high to excellent yields. A wide range of C,N-cyclic N′-acyl azomethineimines and isocyanides were applicable
A three-component reaction of C,N-cyclic N′-acyl azomethine imines, isocyanides, and azide compounds: effective synthesis of 1,5-disubstituted tetrazoles with tetrahydroisoquinoline skeletons
A multicomponent reaction of isocyanides and C,N-cyclic Nâ²-acyl azomethine imines in the presence of TMSCl and NaN3 leads to tetrazole derivatives. These reactions proceeded cleanly to afford the corresponding 1,5-disubstituted tetrazoles containing a tetrahydroisoquinoline skeleton in high to excellent yields.
A newmethod for the highly effective synthesis of α-siloxyamides is described. The addition of isocyanide to aldehyde proceeded smoothly in the presence of silanol to give the corresponding α-siloxyamides in high yields. A wide range of aldehydes and isocyanides are applicable in this reaction.
Chlorosilane-Promoted Addition Reaction of Isocyanides to 3,4-Dihydroisoquinoline <i>N</i>-Oxides
作者:Takahiro Soeta、Shuhei Fujinami、Yutaka Ukaji
DOI:10.1021/jo301791m
日期:2012.11.2
The addition reaction Of isocyanides to 3,4-dihydroisoquindline N-oxides in the presence of TMSCl has been demonstrated, with the corresponding 1,2,3,4-tetrahydroisoquinoline-1-carboxylamides being obtained in moderate to high yields. A wide range of 3,4-dihydroisoquinoline N-oxides and isocyanides were applicable to this reaction.