Pd/C-Catalyzed Carbonylative Synthesis of 2-Aminobenzoxazinones from 2-Iodoaryl Azides and Amines
作者:Youcan Zhang、Zhiping Yin、Hai Wang、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b00966
日期:2019.5.3
palladium-catalyzed carbonylative procedure for the synthesis of 2-aminobenzoxazinones from 1-azido-2-iodobenzenes and amines has been developed. A broad range of 2-aminobenzoxazinone derivatives were prepared in moderate to excellent yields by using Pd/C as the catalyst under CO atmosphere. Notably, by using organic azides as the substrates, external oxidant usage can be successfully avoided and only forms
A pyridine ring-containing benzoxazinone derivative or a pharmaceutically acceptable salt or tautomer thereof represented by general formula (1):
(wherein R1 to R6 and n are as defined in the description) has excellent inhibitory activity against a protease. Thus, the benzoxazinone derivative or a pharmaceutically acceptable salt thereof is useful as an active ingredient for a therapeutic agent for virus infections, particularly herpes virus infections.
Microwave-assisted palladium-catalysed isonitrile insertion in 2-bromophenylureas for efficient synthesis of 4-substituted imino 4H-benzo[d][1,3]oxazin-2-amines
作者:Garima Pandey、Sanjay Batra
DOI:10.1039/c5ra03062e
日期:——
A general route to the synthesis of 4-substituted imino 4H-benzo[d][1,3]oxazin-2-amines via palladium-catalysed isonitrile insertion in 2-bromophenylureas succeeded by a C–O cross-coupling of the intermediate imidoylpalladium species under microwave irradiation is reported.
通过钯在2-溴苯基脲中催化异腈插入合成4-取代的亚氨基4 H-苯并[ d ] [1,3]恶嗪-2-胺的一般途径是中间体的C–O交叉偶联据报道在微波辐射下的亚氨基钯基物种。
Efficient Synthesis of 4h-Benzo[d][1,3]oxazin-4-ones from Anthranilic Acids and Aryl Isoselenocyanates
作者:Yuanyuan Xie、Dongmei Zhu
DOI:10.3184/174751913x13686242406479
日期:2013.6
A synthesis in good to excellent yields of 23 4H-benzo[d][1,3]oxazin-4-ones, 18 of which are novel, from monosubstituted anthranilic acids and variously substituted phenyl isoselenocyanates without using any harsh reagents has been developed. The Se powder precipitated during the reaction could be efficiently recycled for the preparation of the aryl isoselenocyanates.
Mon ami(ne)! A general and convenient methodology for 2‐aminobenzoxazinone synthesis has been developed (see scheme). Readily available 2‐bromoanilines and isocyanates were used as substrates and various products have been prepared in good yields. Notably, [Mo(CO)6] as a solid CO source was applied instead of gas.