Benzophenone → N-(Diphenylmethylene)glycine tert-butyl ester

HRID 1907400Notes

Reaction equation

[NH2:1][CH2:2][C:3]([O:5][C:6]([CH3:9])([CH3:8])[CH3:7])=[O:4].[C:10]([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)(=O)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.CC1C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1>[C:11]1([C:10](=[N:1][CH2:2][C:3]([O:5][C:6]([CH3:9])([CH3:8])[CH3:7])=[O:4])[C:18]2[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=2)[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1

Participants

Conditions

Temperature: 15 °C

Procedure

A solution of t-butyl 2-aminoacetate (113.7 g, 866.8 mmol, 1.0 equiv) in toluene (1000 mL) was combined with benzophenone (157.9 g, 866.5 mmol, 1.0 equiv) and 4-methylbenzenesulfonic acid (14.9 g, 86.5 mmol, 0.1 equiv). The resulting solution was heated to reflux overnight. The mixture was then concentrated in vacuo to 600 mL. The mixture was cooled to 15° C. with a water/ice bath. The product precipitated and the solids were collected by filtration. The solids was washed with petroleum ether (5×150 mL) to yield t-butyl 2-(diphenylmethyleneamino)acetate (125 g) as a white solid.

Workup

temperatureThe resulting solution was heated
temperatureto reflux overnight
concentrationThe mixture was then concentrated in vacuo to 600 mL
customThe product precipitated
filtrationthe solids were collected by filtration
washThe solids was washed with petroleum ether (5×150 mL)

Sources & evidence

ORD record: ord-170a8270a06147ab9d3feef3692930df
Source dataset: uspto-grants-2013_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08598170B2

Reaction notes

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