tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate

Base Information

Chemical Name:tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate
CAS No.:293744-35-1
Molecular Formula:C₂₅H₃₀N₂O₃
Molecular Weight:406.525
Hs Code.:

Synonyms:tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate

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Chemical Property of tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate

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Technology Process of tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate

There total 5 articles about tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-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: 78.3%

: 293744-32-8
tert-butyl 4-{[(benzyl)(2-bromo-4-methylphenyl)amino]carbonyl}piperidine-1-carboxylate

: 293744-35-1
tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate

Guidance literature:: With 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl; sodium t-butanolate; [Pd(dibenzylideneacetone)2]; In 1,4-dioxane; at 95 - 105 ℃; for 4.5h;
DOI:10.1002/1522-2675(20000607)83:6<1247::AID-HLCA1247>3.0.CO;2-1

Reference yield:

2-bromo-p-toluidine: 583-68-6
2-bromo-p-toluidine

: 293744-35-1
tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate

Guidance literature:: Multi-step reaction with 3 steps

1: 28.873 g / Et₃N; DMAP; pyridine / CH₂Cl₂ / 14 h / 20 °C

2: 95.4 percent / KF-Al₂O₃ / 1,2-dimethoxy-ethane / 216 h / 20 °C

3: 78.3 percent / t-BuONa; rac-BINAP / [Pd(dba)2] / dioxane / 4.5 h / 95 - 105 °C

With pyridine; dmap; potassium fluoride on basic alumina; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl; triethylamine; sodium t-butanolate; [Pd(dibenzylideneacetone)2]; In 1,4-dioxane; 1,2-dimethoxyethane; dichloromethane; 1: Acylation / 2: benzylation / 3: Cyclization;
DOI:10.1002/1522-2675(20000607)83:6<1247::AID-HLCA1247>3.0.CO;2-1

Reference yield:

: 84358-13-4,174286-31-8
N-[(tert-butoxy)carbonyl]piperidine-4-carboxylic acid

: 293744-35-1
tert-butyl 1-benzyl-1,2-dihydro-5-methyl-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate

Guidance literature:: Multi-step reaction with 4 steps

1: SOCl₂; pyridine / CH₂Cl₂ / 0.42 h / 20 °C

2: 28.873 g / Et₃N; DMAP; pyridine / CH₂Cl₂ / 14 h / 20 °C

3: 95.4 percent / KF-Al₂O₃ / 1,2-dimethoxy-ethane / 216 h / 20 °C

4: 78.3 percent / t-BuONa; rac-BINAP / [Pd(dba)2] / dioxane / 4.5 h / 95 - 105 °C

With pyridine; dmap; potassium fluoride on basic alumina; thionyl chloride; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl; triethylamine; sodium t-butanolate; [Pd(dibenzylideneacetone)2]; In 1,4-dioxane; 1,2-dimethoxyethane; dichloromethane; 1: Substitution / 2: Acylation / 3: benzylation / 4: Cyclization;
DOI:10.1002/1522-2675(20000607)83:6<1247::AID-HLCA1247>3.0.CO;2-1