N-BOC-4,4-difluoro-L-proline synthesis
- Product Name:N-BOC-4,4-difluoro-L-proline
- CAS Number:203866-15-3
- Molecular formula:C10H15F2NO4
- Molecular Weight:251.23
203866-17-5
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$13.00/100mg
203866-15-3
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$15.00/250mg
Yield:203866-15-3 99%
Reaction Conditions:
Stage #1: 1-tert-butyl 2-methyl (2S)-4,4-difluoropyrrolidine-1,2-dicarboxylatewith water;sodium hydroxide in tetrahydrofuran;methanol at 20; for 1 h;
Stage #2: with hydrogenchloride in water;
Steps:
63
PREPARATION 63CS^-l -iiert-ButoxycarbonylJ^^-difluoropyrrolidine^-carboxylic acid1.08 g (4.08 mmol) of (S)^ -ferf-butyl 2-methyl 4,4-difluoropyrrolidine-1 ,2-dicarboxylate (purchased from Aldrich; cat. no. 702463) were dissolved in a mixture of 10 mL of methanol and 10 mL of tetrahydrofurane and 6.12 mL of a 2M aqueous solution of sodium hydroxide were added. The solution was stirred at room temperature for 1 hour and then the organic solvents were removed. The remaining solution was diluted with water and 6.12 mL of 2M hydrochloric acid were added. The product that precipitated was extracted with dichloromethane (x3), the combined organic layers were washed with brine, dried over magnesium sulphate, filtered and the solvent was removed. 1 .01 g (99% yield) of the title compound were obtained as a white solid.LRMS (m/z): 250 (M-1 )+.
References:
WO2012/146666,2012,A1 Location in patent:Page/Page column 138-139
102195-80-2
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203866-15-3
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74844-91-0
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203866-15-3
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24424-99-5
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203866-15-3
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40216-83-9
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$6.00/5g
203866-15-3
181 suppliers
$15.00/250mg