Реакция #83307

Уравнение реакции

3-(1-ethoxycarbonyl-4-piperidinyl)-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline

Compound ii

3-(1-ethoxycarbonyl-4-piperidinyl)-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline

2,4-dichloro-6,7-dimethoxy-quinazoline

1-ethyl -1,2,3,4-tetrahydro-6-nitro-2,4-dioxo-3-(4-piperidinyl)quinazoline hydrobromide

→

Compound 79

Выход 78.0%

3-[1-(2-Chloro-6,7-dimethoxy-4-quinazolinyl)-4-piperidinyl]-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline

Выход 78.0%

Условия реакции

Обработка

1. 1
   Другоеwas obtained

Методика

The procedure similar to that described in Example 15 was repeated, except that 3.62 g (9.4 mmol) of 3-(1-ethoxycarbonyl-4-piperidinyl)-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline (Compound ii) was used in place of Compound a, whereby 3.20 g of crude 1-ethyl -1,2,3,4-tetrahydro-6-nitro-2,4-dioxo-3-(4-piperidinyl)quinazoline hydrobromide (Compound jj) was obtained. The product (198.0 mg) was treated in the similar manner as in Example 40, except for the use of 2,4-dichloro-6,7-dimethoxy-quinazoline in place of 4-chloro-6,7-dimethoxy-quinazoline, to give 220.7 mg (yield: 78%) of Compound 79 as pale yellow crystals.

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