3-Hydroxypyrroles and 1H-pyrrol-3(2H)-ones. Part 13. Reactions of methoxymethylene Meldrum's acid with 3-hydroxypyrroles, with 3-methoxypyrroles and with other active substrates, and pyrolytic heterocyclisations of the products
摘要:
Methoxymethylene Meldrum's acid 2 in acetonitrile solution acts as a useful C-electrophile for active substrates such as pyrrole, indole or tertiary enaminones to give substitution products (e.g. 5, 6 or 12, respectively). Primary enaminones react exclusively at the nitrogen atom under these conditions. The effect of ring substituents on the regiochemistry of electrophilic substitution of 3-hydroxypyrroles and 3-methoxypyrroles was studied using methoxymethylene Meldrum's acid as the electrophile. Flash vacuum pyrolysis of the Meldrum's acid derivatives obtained in many of these reactions gave access to a range of heterocyclic systems, including the pyridone 48, quinolinedione 43, benzazepinedione 41 and fused pyrones 50, 52 and 54.
PYRIDONE COMPOUNDS AND AGRICULTURAL AND HORTICULTURAL FUNGICIDES CONTAINING THE SAME AS ACTIVE INGREDIENTS
申请人:MITSUI CHEMICALS AGRO, INC.
公开号:US20200045968A1
公开(公告)日:2020-02-13
Pyridine compounds of Formula (1) are provided:
wherein R1, R2, X, Y and Het are defined. The pyridine compounds can be used to treat or prevent plant diseases.
Pyridone compounds and agricultural and horticultural fungicides containing the same as active ingredients
申请人:MITSUI CHEMICALS AGRO, INC.
公开号:US11178870B2
公开(公告)日:2021-11-23
Pyridine compounds of Formula (1) are provided:
wherein R1, R2, X, Y and Het are defined. The pyridine compounds can be used to treat or prevent plant diseases.
提供了式 (1) 的吡啶化合物:
其中 R1、R2、X、Y 和 Het 已定义。吡啶化合物可用于治疗或预防植物病害。