Acetic Acid → (S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(3-(4-isopropylpiperazin-1-yl)phenyl)-5-methylbenzo[d]thiazol-6-yl)acetic acid

HRID 879628Notes

Reaction equation

HRID 879628 reaction equation
[C:1]([O:5][C@@H:6]([C:10]1[C:30]([CH3:31])=[CH:29][C:13]2[N:14]=[C:15]([C:17]3[CH:22]=[CH:21][CH:20]=[C:19]([N:23]4[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]4)[CH:18]=3)[S:16][C:12]=2[C:11]=1[C:32]1[CH:37]=[CH:36][C:35]([Cl:38])=[CH:34][CH:33]=1)[C:7]([OH:9])=[O:8])([CH3:4])([CH3:3])[CH3:2].[CH3:39][C:40]([CH3:42])=O.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>CO.O>[C:1]([O:5][C@@H:6]([C:10]1[C:30]([CH3:31])=[CH:29][C:13]2[N:14]=[C:15]([C:17]3[CH:22]=[CH:21][CH:20]=[C:19]([N:23]4[CH2:28][CH2:27][N:26]([CH:40]([CH3:42])[CH3:39])[CH2:25][CH2:24]4)[CH:18]=3)[S:16][C:12]=2[C:11]=1[C:32]1[CH:33]=[CH:34][C:35]([Cl:38])=[CH:36][CH:37]=1)[C:7]([OH:9])=[O:8])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 180AcetoneHCID 5049666Sodium triacetoxyborohydrideHCID 86700437(S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(3-(piperazin-1-yl)phenyl)benzo[d]thiazol-6-yl)acetic acid

Product 1

HCID 86700438(S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(3-(4-isopropylpiperazin-1-yl)phenyl)-5-methylbenzo[d]thiazol-6-yl)acetic acid

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

To a solution of (S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(3-(piperazin-1-yl)phenyl)benzo[d]thiazol-6-yl)acetic acid (30 mg, 0.055 mmol) in MeOH (1 mL) was added acetone (0.20 mL), acetic acid (0.08 mL), and sodium triacetoxyborohydride (58 mg, 0.27 mmol). Stirred at rt for 18 h then 60° C. for 3 h (reaction not to completion). H2O added (1 mL) and purified using reverse phase HPLC, eluting by 2-100% acetonitrile in H2O with 0.1% TFA to give the product. 1H NMR (400 MHz, CD3OD) δ 7.83 (s, 1H), 7.68 (m, 2H), 7.58 (m, 3H), 7.43 (t, J=8 Hz, 1H), 7.21 (d, J=8 Hz, 1H), 5.25 (s, 1H), 4.02 (m, 2H), 3.60 (m, 4H), 3.12 (m, 3H), 2.61 (s, 3H), 1.43 (d, J=7 Hz, 6H), 0.97 (s, 9H). LCMS-ESI+: calc'd for C33H39ClN3O3S: 592.2 (M+H+); Found: 592.3 (M+H+).

Workup

  1. custom60° C. for 3 h (reaction not to completion)
  2. custompurified
  3. washeluting by 2-100% acetonitrile in H2O with 0.1% TFA
  4. customto give the product

Sources & evidence

ORD record
ord-0477f670ef80479faadd1b94414956ee
Source dataset
uspto-grants-2015_03
Patent number
US08987250B2

Reaction notes

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