Oxalyl chloride → (R)-3-cyclohexyl-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid chloride

Participants

Reaction Steps

To a solution of (R)-3-cyclohexyl-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid (362 mg, 1.23 mmol) in dichloromethane (20 ml) was added oxalyl chloride (0.215 ml, 2.46 mmol). The deep blue mixture was stirred at room temperature for 2 h and then the solvent was removed in vacuo to afford (R)-3-cyclohexyl-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid chloride (380 mg, 1.23 mmol) as a blue solid.

Provenance & Evidence