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

HRID 2269002Notes

Reaction equation

HRID 2269002 reaction equation
[Cl:1][C:2]1[C:3]([N:8]([CH2:33][O:34][CH2:35][CH2:36][O:37][CH3:38])[S:9]([C:12]2[C:20]3[C:15](=[N:16][CH:17]=[CH:18][CH:19]=3)[S:14][C:13]=2[CH:21](O)[C:22]2[CH:27]=[C:26]3[O:28][CH2:29][O:30][C:25]3=[CH:24][C:23]=2[CH3:31])(=[O:11])=[O:10])=[N:4][O:5][C:6]=1[CH3:7].C([SiH](CC)CC)C.B(F)(F)F.CCOCC>C(Cl)Cl>[Cl:1][C:2]1[C:3]([N:8]([CH2:33][O:34][CH2:35][CH2:36][O:37][CH3:38])[S:9]([C:12]2[C:20]3[C:15](=[N:16][CH:17]=[CH:18][CH:19]=3)[S:14][C:13]=2[CH2:21][C:22]2[CH:27]=[C:26]3[O:28][CH2:29][O:30][C:25]3=[CH:24][C:23]=2[CH3:31])(=[O:11])=[O:10])=[N:4][O:5][C:6]=1[CH3:7]

Participants

5

Reactant 3

HCID 8000Boron trifluoride etherateHCID 12052TriethylsilaneHCID 18614043N-(4-chloro-5-methyl-3-isoxazolyl)-N-(methoxyethoxymethyl)-2-[alpha-hydroxy-2-methyl-4,5-(methylenedioxy)-benzyl]thieno[2,3-b]pyridine-3-sulfonamid

Product 1

HCID 18614045N-(4-chloro-5-methyl-3-isoxazolyl)-N-(methoxyethoxymethyl)-2-[2-methyl-4,5-(methylenedioxy)benzyl]thieno[2,3-b]pyridine-3-sulfonamideYield 53.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

The title compound was prepared by the method of Example 5(A) using N-(4-chloro-5-methyl-3-isoxazolyl)-N-(methoxyethoxymethyl)-2-[α-hydroxy-2-methyl-4,5-(methylenedioxy)benzyl]thieno[2,3-b]pyridine-3-sulfonamide (0.11 g, 0.19 mmoles), CH2Cl2 (5 ml), triethyl silane (0.31 ml, 1.9 mmoles) and boron trifluoride etherate (0.12 ml, 0.97 mmoles). Flash chromatography (35% EtOAc/hexanes) provided 58 mg (53%) of the title compound as a tan solid.

Workup

  1. customThe title compound was prepared by the method of Example 5(A)

Sources & evidence

ORD record
ord-7963ebe0261848b49008682e69c048b3
Source dataset
uspto-grants-2001_12
Patent number
US06329387B2

Reaction notes

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