Triphenylphosphine → HCID 54537267, compound

Participants

Reaction Steps

As in Example 15, 4-(-2-chlorophenyl)-2-(3-hydroxy-1-propynyl)-9-methyl-6H-thieno[3,2-f][1,2,4]triazolo[4,3-a][1,4]diazepine (0.369 g) was reacted with 4-hydroxyphenylglyoxylic acid ethyl ester (0.195 g) in the presence of diethyl azodicarboxylate (0.175 g) and triphenylphosphine (0.263 g) in dichloromethane (30 mL). The crude reaction product, isolated in the usual manner, was purified by flash chromatography over silica gel (120 g; ethanol-dichloromethane; 3.5:96.5) to furnish 0.398 g of 4-[3-[4-(2-chlorophenyl)-9-methyl-6H-thieno[3,2-f][1,2,4]triazolo[4,3-a] [1,4]diazepin-2-yl]-2-propynyloxy]-alpha-oxobenzeneacetic acid ethyl ester (4:1 ) hydrate as a white foam.

Provenance & Evidence