On the reaction between alkyl isocyanides and 3-benzylidene-2,4-pentanedione. A convenient synthetic route to densely functionalized furans
摘要:
Alkyl isocyanides undergo a formal [1 + 4] cycloaddition reaction with 3-benzylidene-2,4-pentanedione yielding multiply functionalized furan ring systems in fairly high yields. The H-1 NMR spectrum of 4-acetyl-2-(N-benzylamino)-5-methyl-3-phenylfuran shows an AB pattern for the benzylic methylene protons as a result of a restricted rotation about the bond between the acetyl group and the furan ring, thus giving rise to perpendicular disymmetric planes.
Tandem oxidative isocyanide-based cycloaddition reactions in the presence of MIL-101(Cr) as a reusable solid catalyst
作者:Ahmad Shaabani、Heshmatollah Sepahvand、Mostafa M. Amini、Alireza Hashemzadeh、Mahmoud Borjian Boroujeni、Elham Badali
DOI:10.1016/j.tet.2018.02.046
日期:2018.4
The tandem oxidative three-component synthesis of two types of the heterocycles such as furans and imidazopyridines, via isocyanides [1+4] cycloadditionreactions in the presence of MIL-101(Cr) under aerobic conditions are reported. When the 4-toluenesulfonylmethyl isocyanide was used, an unexpected [3+2] cycloadditionreaction of isocyanides with aldehydes accomplished and dihydrophenyloxazoles and
On the reaction between alkyl isocyanides and 3-benzylidene-2,4-pentanedione. A convenient synthetic route to densely functionalized furans
作者:I. Yavari、A. Shaabani、M. T. Maghsoodlou
DOI:10.1007/bf00807601
日期:——
Alkyl isocyanides undergo a formal [1 + 4] cycloaddition reaction with 3-benzylidene-2,4-pentanedione yielding multiply functionalized furan ring systems in fairly high yields. The H-1 NMR spectrum of 4-acetyl-2-(N-benzylamino)-5-methyl-3-phenylfuran shows an AB pattern for the benzylic methylene protons as a result of a restricted rotation about the bond between the acetyl group and the furan ring, thus giving rise to perpendicular disymmetric planes.