2,3-二氢-1-苯并呋喃-2-甲酰氯

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred solution of 6-[({[(1-methyl-1H-tetrazol-5-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-amine (100 mg, 0.32 mmol) in dry dichloromethane (4 mL) under argon was added pyridine (39 μL, 0.48 mmol) at room temperature, followed after fifteen minutes by 2,3-dihydro-1-benzofuran-2-carbonyl chloride (88 mg, 0.48 mmol). The reaction mixture was stirred overnight at room temperature and quenched by filtration on bi-layer cartridge filled with 1.4 g of basic alumina and 1 g of silica. The cartridge was rinsed twice by 10 mL of dichloromethane. The combined filtrated solutions were evaporated in vacuo to yield a colorless oil. Purification on silica gel afforded of N-{6-[({[(1-methyl-1H-tetrazol-5-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}-2,3-dihydro-1-benzofuran-2-carboxamide as a colorless oil [150 mg, yield 96%; HPLC/MS: nm/z=456 (M+H); log P(HCOOH)=3.67]. quenched by filtration on bi-layer cartridge filled with 1.4 g of basic alumina and 1 g of silica The cartridge was rinsed twice by 10 mL of dichloromethane The combined filtrated solutions were evaporated in vacuo to yield a colorless oil Purification on silica gel