(R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

Base Information

Chemical Name:(R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate
CAS No.:1629161-98-3
Molecular Formula:C₂₅H₂₆N₂O₃
Molecular Weight:402.493
Hs Code.:

Synonyms:(R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

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Chemical Property of (R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

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Technology Process of (R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

There total 4 articles about (R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate 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: 82.0%

: 1212022-43-9
benzyl 2-(acetoxymethyl)buta-2,3-dienoate

: 765957-19-5
2-(tert-butyl)-5-phenyl-2,4-dihydro-3H-pyrazol-3-one

: 1629161-98-3
(R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

Guidance literature:: With N-((2S,3R)-1-(diphenylphosphanyl)-3-((trimethylsilyl)oxy)butan-2-yl)-3,5-bis(trifluoromethyl)benzamide; caesium carbonate; In toluene; at 20 ℃; for 6h; enantioselective reaction; Inert atmosphere;
DOI:10.1002/anie.201311214

Reference yield:

: 1212022-43-9
benzyl 2-(acetoxymethyl)buta-2,3-dienoate

: 765957-19-5
2-(tert-butyl)-5-phenyl-2,4-dihydro-3H-pyrazol-3-one

: 1629161-98-3
(R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

: (S)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

Guidance literature:: With N-((2S,3R)-1-(diphenylphosphanyl)-3-((trimethylsilyl)oxy)butan-2-yl)-3,5-bis(trifluoromethyl)benzamide; caesium carbonate; In 5,5-dimethyl-1,3-cyclohexadiene; at 20 ℃; for 6h; Overall yield = 81%; Optical yield = 85%ee; enantioselective reaction; Inert atmosphere;
DOI:10.1002/anie.201311214

Reference yield:

: 94-02-0
ethyl 3-oxo-3-phenylpropionate

: 1629161-98-3
(R)-benzyl 3-tert-butyl-4-oxo-1-phenyl-2,3-diazaspiro[4.4]nona-1,7-diene-7-carboxylate

Guidance literature:: Multi-step reaction with 2 steps

1: ethanol / Reflux

2: N-((2S,3R)-1-(diphenylphosphanyl)-3-((trimethylsilyl)oxy)butan-2-yl)-3,5-bis(trifluoromethyl)benzamide; caesium carbonate / toluene / 6 h / 20 °C / Inert atmosphere

With N-((2S,3R)-1-(diphenylphosphanyl)-3-((trimethylsilyl)oxy)butan-2-yl)-3,5-bis(trifluoromethyl)benzamide; caesium carbonate; In ethanol; toluene;
DOI:10.1002/anie.201311214