Acetic Acid → 4-Chloro-5-[3-(tert-butyldimethylsiloxy)propoxy]-7-[1-(tert-butoxycarbonyl)-5-(pyrrolidin-1-ylmethyl)indol-2-yl]isoindolinone

HRID 21318Notes

Reaction equation

HRID 21318 reaction equation
[Cl:1][C:2]1[C:10]([O:11][CH2:12][CH2:13][CH2:14][O:15][Si:16]([C:19]([CH3:22])([CH3:21])[CH3:20])([CH3:18])[CH3:17])=[CH:9][C:8]([C:23]2[N:24]([C:34]([O:36][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:35])[C:25]3[C:30]([CH:31]=2)=[CH:29][C:28]([CH:32]=O)=[CH:27][CH:26]=3)=[C:7]2[C:3]=1[CH2:4][NH:5][C:6]2=[O:41].[NH:42]1[CH2:46][CH2:45][CH2:44][CH2:43]1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(#N)C>[Cl:1][C:2]1[C:10]([O:11][CH2:12][CH2:13][CH2:14][O:15][Si:16]([C:19]([CH3:21])([CH3:20])[CH3:22])([CH3:17])[CH3:18])=[CH:9][C:8]([C:23]2[N:24]([C:34]([O:36][C:37]([CH3:38])([CH3:40])[CH3:39])=[O:35])[C:25]3[C:30]([CH:31]=2)=[CH:29][C:28]([CH2:32][N:42]2[CH2:46][CH2:45][CH2:44][CH2:43]2)=[CH:27][CH:26]=3)=[C:7]2[C:3]=1[CH2:4][NH:5][C:6]2=[O:41]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 31268PyrrolidineHCID 5049666Sodium triacetoxyborohydrideHCID 866283314-Chloro-5-[3-(tert-butyldimethylsiloxy)propoxy]-7-[1-(tert-butoxycarbonyl)-5-formylindol-2-yl]isoindolinone

Product 1

HCID 684921454-Chloro-5-[3-(tert-butyldimethylsiloxy)propoxy]-7-[1-(tert-butoxycarbonyl)-5-(pyrrolidin-1-ylmethyl)indol-2-yl]isoindolinoneYield 66%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

In a similar manner to Step 2 of Example 6, 4-chloro-5-[3-(tert-butyldimethylsiloxy)propoxy]-7-[1-(tert-butoxycarbonyl)-5-formylindol-2-yl]isoindolinone (71.8 mg, 0.120 mmol) was dissolved in acetonitrile (2.5 mL), and the solution was treated with pyrrolidine (0.100 mL, 1.198 mmol), acetic acid (0.069 mL, 1.198 mmol) and sodium triacetoxyborohydride (76.3 mg, 0.360 mmol), followed by purification by flash column chromatography (chloroform/methanol=19/1, 4/1) to obtain 4-chloro-5-[3-(tert-butyldimethylsiloxy)propoxy]-7-[1-(tert-butoxycarbonyl)-5-(pyrrolidin-1-ylmethyl)indol-2-yl]isoindolinone (51.4 mg, yield 66%).

Workup

  1. customfollowed by purification by flash column chromatography (chloroform/methanol=19/1, 4/1)

Sources & evidence

ORD record
ord-f87bd281c4a94fe3a6765883725e93c4
Source dataset
uspto-grants-2010_06
Patent number
US07745641B2

Reaction notes

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