Triethylamine → tert-butyl ((1S)-2-hydroxy-1-{3-[(trimethylsilyl)ethynyl]benzyl}ethyl)carbamate

HRID 339976Notes

Reaction equation

[OH:1][CH2:2][C@@H:3]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:17])[CH3:16])[CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[C:7](I)[CH:6]=1.C(N(CC)CC)C.[CH3:27][Si:28]([C:31]#[CH:32])([CH3:30])[CH3:29]>[Cu]I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O1CCCC1>[OH:1][CH2:2][C@@H:3]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:17])[CH3:16])[CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[C:7]([C:32]#[C:31][Si:28]([CH3:30])([CH3:29])[CH3:27])[CH:6]=1

Participants

Conditions

Temperature: 65 °C

Procedure

tert-Butyl [(1S)-2-hydroxy-1-(3-iodobenzyl)ethyl]carbamate (1.0 g, 2.6 mmol), copper(I) iodide (0.020 g, 0.11 mmol), bis(triphenylphosphine)palladium(II) chloride (0.074 g, 0.11 mmol), tetrahydrofuran (7 mL), and triethylamine (0.41 mL, 2.9 mmol) were combined. The reaction mixture was stirred under N2 for 5 min. (Trimethylsilyl)acetylene (1.1 mL, 8.0 mmol) was then added. The reaction mixture was stirred at 65° C. for 1 h, then evaporated under vacuum. The residue was purified by combi-flash chromatography to give 0.84 g (91% yield) of the desired product as light brown solid. LC-MS found: 248.0 (M−Boc+H)+.

Workup

additionwas then added
customevaporated under vacuum
customThe residue was purified by combi-flash chromatography

Sources & evidence

ORD record: ord-cf6e89985bda4174937d4743d0083d46
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08895571B2

Reaction notes

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