Triethylamine → 8-Cyclopropyl-6-trimethylsilanylethynyl-2,2,4,4-tetramethyl chroman

HRID 1936036Notes

Reaction equation

HRID 1936036 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C:9](=[C:10]([CH:12]3[CH2:14][CH2:13]3)[CH:11]=1)[O:8][C:7]([CH3:16])([CH3:15])[CH2:6][C:5]2([CH3:18])[CH3:17].[CH3:19][Si:20]([C:23]#[CH:24])([CH3:22])[CH3:21].C(N(CC)CC)C>[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>[CH:12]1([C:10]2[CH:11]=[C:2]([C:24]#[C:23][Si:20]([CH3:22])([CH3:21])[CH3:19])[CH:3]=[C:4]3[C:9]=2[O:8][C:7]([CH3:16])([CH3:15])[CH2:6][C:5]3([CH3:18])[CH3:17])[CH2:14][CH2:13]1

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 181779666-Bromo-8-cyclopropyl-2,2,4,4-tetramethyl chroman2×

Product 1

HCID 187197898-Cyclopropyl-6-trimethylsilanylethynyl-2,2,4,4-tetramethyl chroman

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8028TetrahydrofuranSolvent

Procedure

Following general procedure D and using 6-bromo-8-cyclopropyl-2,2,4,4-tetramethyl chroman (Intermediate 32, 0.376 g, 1.22 mmol), (trimethylsilyl)acetylene (4 mL, 28 mmol), triethyl amine (3 mL), anhydrous tetrahydrofuran (5 mL), copper(I)iodide (0.025 g, 0.13 mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.075 g, 0.11 mmol), the title compound was obtained as an oil (0.173 g, 43%).

Sources & evidence

ORD record
ord-fe53c1d7fae149c38b4a08f5d45cea1c
Source dataset
uspto-grants-2002_05
Patent number
US06387951B1

Reaction notes

Loading…