A facile approach for the synthesis of novel 1-oxa- and 1-aza-flavonyl-4-methyl-1H-benzo[d][1,3]oxazin-2(4H)-ones by microwave enhanced Suzuki–Miyaura coupling using bidentate chromen-4-one-based Pd(<scp>ii</scp>)–diimine complex as catalyst
作者:Sumit Kumar、Naseem Ahmed
DOI:10.1039/c5ra15274g
日期:——
to diversely substituted 1-oxa- and 1-aza-flavonyl-4-methyl-1H-benzo[d][1,3]oxazin-2(4H)-ones using the microwave assisted phosphine-free Suzuki coupling of bromo flavones with boronic acids using a chromen-4-one-containing Pd(II)–diimine complex (C) as catalyst under aerobic conditions is reported. A small amount of the catalyst (0.3 mol%) was found to be highlyeffective for coupling to form the products
使用微波辅助的无膦Suzuki轻松获得不同取代的1-oxa-和1-aza-flavonyl-4-methyl-1 H -benzo [ d ] [1,3] oxazin-2(4 H)-ones溴黄酮与含硼酸的硼酸的耦合使用含铬4的Pd(II)-二亚胺络合物(C据报道在有氧条件下作为催化剂。发现少量的催化剂(0.3摩尔%)对于在温和的反应条件下以18-20分钟的非常高的收率偶合形成产物非常有效。该催化体系与广泛范围的烯烃或芳基溴化物以及芳基或杂芳基硼酸兼容。在筛选了各种催化条件后,发现双齿席夫碱配体的Pd络合物能够有效催化这些反应,产率高达95%。还描述了溶剂,碱和催化剂负载量对偶联反应的影响。
CONDENSED CYCLIC COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
申请人:SAMSUNG ELECTRONICS CO., LTD.
公开号:US20170358755A1
公开(公告)日:2017-12-14
A condensed cyclic compound represented by Formula 1:
Ar
1
-L
1
-L
2
-Ar
2
Formula 1
wherein in Formula 1, Ar
1
, Ar
2
, L
1
, and L
2
are the same as described in the specification.