Benzyl chloroformate → HCID 86601825, compound

HRID 2115952Notes

Reaction equation

[S:1]1[CH:5]=[CH:4][C:3]([C:6]2[C:14]3[O:13][CH:12]([CH2:15][NH2:16])[CH2:11][C:10]=3[CH:9]=[CH:8][CH:7]=2)=[CH:2]1.C(N(C(C)C)CC)(C)C.Cl[C:27]([O:29][CH2:30][C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)=[O:28]>>[CH2:30]([O:29][C:27](=[O:28])[NH:16][CH2:15][CH:12]1[CH2:11][C:10]2[CH:9]=[CH:8][CH:7]=[C:6]([C:3]3[CH:4]=[CH:5][S:1][CH:2]=3)[C:14]=2[O:13]1)[C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1

Participants

Reactant 3

HCID 10387Benzyl chloroformate

HCID 81531Diisopropylethylamine

HCID 11960763HCID 11960763, compound

Product 1

HCID 86601825HCID 86601825, compoundYield 71%

Procedure

Treatment of (±)-1-(7-thien-3-yl-2,3-dihydro-1-benzofuran-2-yl)methanamine (0.56 g, 2.09 mmol) with diisopropylethylamine (0.406 g, 3.14 mmol) and benzyl chloroformate (0.393 g, 2.30 mmol) generally according to the procedure described for Intermediate 12 provided 0.54 g (71%) of (±)-benzyl(7-thien-3-yl-2,3-dihydro-1-benzofuran-2-yl)methylcarbamate as a colorless oil. Rf=0.49 (silica, ethyl acetate:hexanes 2:8); Anal. calcd. for C21H19NO3S.0.3H2O: C, 68.01; H, 5.33; N, 3.78. Found: C, 67.88; H, 5.18; N, 3.72. Chiral HPLC separation of (±)-benzyl(7-thien-3-yl-2,3-dihydro-1-benzofuran-2-yl)methylcarbamate (Chiralcel AD, water:methanol 1:9) provided two fractions. Fraction 1 (Rt=13.00 min, (Chiralcel AD, water:methanol 1:9); Fraction 2 (Rt=14.1 min, (Chiralcel AD, water:methanol 1:9).

Sources & evidence

ORD record: ord-c99e030171a54cffba875a4c4b166b07
Source dataset: uspto-grants-2008_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07435837B2

Reaction notes

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