(R)-3-((S)-1-(4-bromophenyl)ethyl)-6-(2-methylallyl)-6-phenyl-1,3-oxazinan-2-one → 3-[(S)-1-(4-Bromo-3-methyl-phenyl)-ethyl]-(R)-6-(2-methyl-allyl)-6-phenyl-[1,3]oxazinan-2-one
Reaction equation
Cl[CH2:2][CH2:3][C:4]([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1)([OH:9])[CH2:5][C:6]([CH3:8])=[CH2:7].[Br:16][C:17]1[CH:22]=[CH:21][C:20]([C@@H:23]([N:25]=[C:26]=[O:27])[CH3:24])=[CH:19][C:18]=1[CH3:28].BrC1C=CC([C@@H](N2CC[C@](CC(C)=C)(C3C=CC=CC=3)OC2=O)C)=CC=1>>[Br:16][C:17]1[CH:22]=[CH:21][C:20]([C@@H:23]([N:25]2[CH2:2][CH2:3][C@:4]([CH2:5][C:6]([CH3:8])=[CH2:7])([C:10]3[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=3)[O:9][C:26]2=[O:27])[CH3:24])=[CH:19][C:18]=1[CH3:28]Participants
Reactant 3
Product 1
Procedure
The title compound was prepared from 1-chloro-5-methyl-3-phenyl-hex-5-en-3-ol and (S)-1-bromo-4-(1-isocyanato-ethyl)-2-methyl-benzene following a procedure analogous to that described in Step 1 of Example 96. Mass spectrum (ESI+): m/z=428/430 (Br) [M+H]+; 1H NMR (400 MHz, DMSO-d6) 1.40 (d, J=6.9 Hz, 3H), 1.55 (s, 3H), 2.13 (s, 3H) superimposed on 2.07-2.18 (m, 2H), 2.42-2.47 (m, 1H), 2.53 (broad s, 2H), 2.92-3.03 (m, 1H), 4.60 (hardly resolved m, 1H), 4.77 (hardly resolved m, 1H), 5.33 (q, J=6.9 Hz, 1H), 6.62 (dd, J=8.2 Hz, 2.0 Hz, 1H), 6.76 (hardly resolved d, 1H), 7.26-7.33 (m, 4H), 7.34-7.40 (m, 2H). The assignment of the stereogenic centers of the title compound is based on the comparison of the 1H NMR data with the data of the known analog 3-[(S)-1-(4-bromo-phenyl)-ethyl]-(R)-6-(2-methyl-allyl)-6-phenyl-[1,3]oxazinan-2-one.
Sources & evidence
- ORD record
- ord-5fb491a7638345c88711b71c6d3b8e47
- Source dataset
- uspto-grants-2014_06
- Patent number
- US08754076B2
Reaction notes
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