(2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

Base Information

Chemical Name:(2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)
CAS No.:428868-18-2
Molecular Formula:C₂₀H₂₆N₂O₃
Molecular Weight:342.438
Hs Code.:

Synonyms:(2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

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Chemical Property of (2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

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Technology Process of (2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

There total 3 articles about (2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one) which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 56.0%

: 591-51-5
phenyllithium

: 210431-45-1
(2R,5S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro-(3-cyclohexen-2-one)

: (2R,5S,4'R)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

: 428868-18-2
(2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

Guidance literature:: With copper(l) iodide; In diethyl ether; at -78 ℃; for 0.75h;
DOI:10.1081/SCC-120002404

Reference yield:

: 210431-43-9
(2R,5S)-5-(3-butenyl)-2,5-dihydro-3,6-dimethoxy-2-isopropyl-5-(1-oxo-2-propenyl)pyrazine

: 428868-18-2
(2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

Guidance literature:: Multi-step reaction with 2 steps

1: 76 percent / bis(tricyclohexylphosphine)benzylidene ruthenium dichloride / 1,2-dichloro-ethane / 4 h / 40 °C

2: 56 percent / CuI / diethyl ether / 0.75 h / -78 °C

With copper(l) iodide; Grubbs catalyst first generation; In diethyl ether; 1,2-dichloro-ethane;
DOI:10.1081/SCC-120002404

Reference yield:

: (2R,5S,1'S/R)-5-(3-butenyl)-2,5-dihydro-3,6-dimethoxy-5-(1-hydroxy-2-propenyl)-2-isopropylpyrazine

: 428868-18-2
(2R,5S,4'S)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine-5-spiro(4-phenylcyclohexan-2-one)

Guidance literature:: Multi-step reaction with 3 steps

1: 73 percent / (COCl)2; DMSO / CH₂Cl₂ / -60 - -10 °C

2: 76 percent / bis(tricyclohexylphosphine)benzylidene ruthenium dichloride / 1,2-dichloro-ethane / 4 h / 40 °C

3: 56 percent / CuI / diethyl ether / 0.75 h / -78 °C

With copper(l) iodide; Grubbs catalyst first generation; oxalyl dichloride; dimethyl sulfoxide; In diethyl ether; dichloromethane; 1,2-dichloro-ethane; 1: Swern oxidation;
DOI:10.1081/SCC-120002404