Benzyl chloroformate → HCID 91385942, compound

HRID 2115950Notes

Reaction equation

HRID 2115950 reaction equation
[CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[C:16]2[O:15][CH:14]([CH2:17][NH2:18])[CH2:13][C:12]=2[CH:11]=[CH:10][CH:9]=1.C(N(C(C)C)CC)(C)C.Cl[C:29]([O:31][CH2:32][C:33]1[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=1)=[O:30]>>[CH2:32]([O:31][C:29](=[O:30])[NH:18][CH2:17][CH:14]1[CH2:13][C:12]2[CH:11]=[CH:10][CH:9]=[C:8]([C:3]3[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=3[CH3:1])[C:16]=2[O:15]1)[C:33]1[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=1

Participants

4

Reactant 3

HCID 10387Benzyl chloroformateHCID 81531DiisopropylethylamineHCID 11960764HCID 11960764, compound

Product 1

HCID 91385942HCID 91385942, compoundYield 85.1%

Procedure

Treatment of (±)-[7-(2-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methanamine (3.55 g, 12.9 mmol) with diisopropylethylamine (2.5 g, 19.4 mmol) and benzyl chloroformate (2.42 g, 14.2 mmol) generally according to the procedure described for Intermediate 12 provided 4.1 g (85%) of (±)-benzyl[7-(2-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methylcarbamate as a clear oil Rf=0.64 (silica, ethyl acetate:hexanes 1:4); Anal. calcd. for C24H23F4NO3: C, 77.19; H, 6.21; N, 3.75. Found: C, 76.95; H, 6.18; N, 3.53. Chiral HPLC separation of (±)-benzyl[7-(2-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methylcarbamate (Chiralcel OD, isopropanol:hexane 1:4) provided two fractions. Fraction 1 (Rt=7.285 min, isopropanol:hexane 1:4); Fraction 2 (Rt=9.361 min, Chiralcel OD, isopropanol:hexane 1:4).

Sources & evidence

ORD record
ord-17966c88accf4e43a30dd31c7c776d0d
Source dataset
uspto-grants-2008_10
Patent number
US07435837B2

Reaction notes

Loading…