Diisopropylethylamine → 1-[(1S,3R)-3-[[tert-butyl(dimethyl)silyl]oxymethyl]-5-(3-hydroxy-3-methyl-butyl)-1-methyl-3,4-dihydro-1H-isoquinolin-2-yl]-2-(2-chloro-5-methoxy-phenyl)ethanone

Participants

Role	Name	HCID	Charge
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)	HCID 9886157	—
Reactant	2-Chloro-5-methoxybenzeneacetic acid	HCID 15365958	—
Reactant	4-((1S,3R)-3-(((tert-Butyldimethylsilyl)oxy)methyl)-1-methyl-1,2,3,4-tetrahydroisoquinolin-5-yl)-2-methylbutan-2-ol	HCID 123625227	—
Solvent	Dichloromethane	HCID 6344	—
Product	1-[(1S,3R)-3-[[tert-butyl(dimethyl)silyl]oxymethyl]-5-(3-hydroxy-3-methyl-butyl)-1-methyl-3,4-dihydro-1H-isoquinolin-2-yl]-2-(2-chloro-5-methoxy-phenyl)ethanone	HCID 124008500	—

Reaction Steps

Dissolve 4-[(1S,3R)-3-[[tert-butyl(dimethyl)silyl]oxymethyl]-1-methyl-1,2,3,4-tetrahydroisoquinolin-5-yl]-2-methyl-butan-2-ol (0.36 g, 0.95 mol in dichloromethane (9.5 mL). Add diisopropylethylamine (499 μL, 2.86 mmol). Add 2-(2-chloro-5-methoxy-phenyl)acetic acid (229.5 mg, 1.14 mmol). Add O-(7-aza-1H-benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (561 mg, 1.40 mmol) and stir at ambient temperature overnight. Dilute the reaction mixture with dichloromethane and wash with water and brine, dry over sodium sulfate, filter, and concentrate under reduced pressure to give a brown oil. Purify the residue by silica gel chromatography, eluting with acetone: hexanes (gradient, 0-20%) to give the title compound as an opaque oil (0.46 g, 0.82 mmol). MS (m/z): 560.2 (M+1).

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08962654B2
Source dataset	uspto-grants-2015_02
ORD ID	ord-e2599a92149b400d922a69857e593021
Source note	uspto-grants-2015_02