HCID 22923500, compound → HCID 22923432, compound

Participants

Reaction Steps

The procedure similar to that described in Example 15 was repeated, except that 61.1 mg (0.15 mmol) of 3-(1-exthoxycarbonyl-3-ethyl-4-piperidinyl)-1,2,3,4 -tetrahydro-1-methyl-6-nitro-2,4-dioxoquinazoline (Compound 11: diastereomixture) was used in place of Compound a, whereby 70.4 mg of crude 3-(3-ethyl-4-piperidinyl)-1,2,3,4-tetrahydro-1-methyl-6-nitro-2,4-dioxoquinazoline hydrobromide was obtained. The product was treated in the similar manner as in Example 15 to give 30.4 mg (yield: 39%) of Compound 104 as a 6:4 diastereomixture.

Provenance & Evidence