Boron trifluoride etherate → N-(4-chloro-3-methyl-5-isoxazolyl)-N-(methoxyethoxymethyl)-2-[3,4-(methylenedioxy)benzyl]thieno[2,3-b]pyridine-3-sulfonamide

Participants

Reaction Steps

To a solution of N-(4-chloro-3-methyl-5-isoxazolyl)-N-(methoxyethoxymethyl)-2 -(α-hydroxy-3,4-(methylenedioxy) benzyl]-thieno [2,3-b]pyridine-3-sulfonamide (0.10 g, 0.18 mmoles)[see Example 4(B)] and triethylsilane (0.29 ml, 1.8 mmoles) in CH2Cl2 (2 ml) was added boron trifluoride etherate (0.10 ml, 0.81 mmoles). The orange-brown solution was stirred 2 hours at ambient temperature then diluted with EtOAc (50 ml) and washed with H2O (75 ml). The organic layer was dried (MgSO4), filtered and concentrated to collect an orange oil. Flash chromatography (40% EtOAc/hexanes) provided 66 mg (66%) of the title compound as a yellow oil.

Provenance & Evidence