Recyclable Heterogeneous Palladium-Catalyzed Carbonylative Cyclization of 2-Iodoanilines with Aryl Iodides Leading to 2-Arylbenzoxazinones
作者:Zhaotao Xu、Bin Huang、Zebiao Zhou、Mingzhong Cai
DOI:10.1055/s-0039-1690265
日期:2020.2
A highly efficient and practical heterogeneous palladium-catalyzedcarbonylative coupling of 2-iodoanilines with aryl iodides has been developed. The reaction occurs smoothly in toluene at 110 °C with N,N-diisopropylethylamine as base under carbon monoxide (5 bar) and offers a general and powerful tool for the construction of various valuable 2-arylbenzoxazinones with excellent atom-economy, high functional
An ultraviolet absorbent represented by the following Formula (1) or (6):
wherein, Het
1
represents a monovalent five- or six-membered aromatic heterocyclic residue; X
a
and X
b
each independently represent a heteroatom; Y
a
to Y
c
each independently represent a heteroatom or a carbon atom; the ring formed from carbon atom, X
a
, X
b
, Y
a
to Y
c
may have a double bond at any position and has at least one fused ring;
wherein, Het
6
represents a monovalent five- or six-membered aromatic heterocyclic residue; X
6a
and X
6b
each independently represent a heteroatom; Y
6a
, Y
6b
and Y
6c
each independently represent a heteroatom or a carbon atom; L
6
represents a bi- to octa-valent connecting group; n is an integer of 2 or more, and m is an integer of 0 or more.