Methanesulfonyl chloride → Tert-butyl (3R)-3-(methanesulfonyloxy)pyrrolidine-1-carboxylate

Reaktionsgleichung

N1CC[C@H](/C=C/C2C=NC=NC=2)C1.[OH:14][C@@H:15]1[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16]1.[CH3:27][S:28](Cl)(=[O:30])=[O:29]>>[CH3:27][S:28]([O:14][C@@H:15]1[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16]1)(=[O:30])=[O:29]

Komponenten

Edukt 3

HCID 31297Methanesulfonyl chloride

HCID 6544479tert-Butyl (3R)-3-hydroxypyrrolidine-1-carboxylate2×

HCID 11528435Simpinicline

Produkt 1

HCID 10934372Tert-butyl (3R)-3-(methanesulfonyloxy)pyrrolidine-1-carboxylate

Versuchsvorschrift

One aspect of the present invention includes the method for the stereospecific synthesis of (R)-5-((E)-2-pyrrolidin-3-ylvinyl)pyrimidine (11) outlined in Scheme 1. Commercially available tert-butyl (R)-3-hydroxypyrrolidine-1-carboxylate (compound 1) is treated with methanesulfonyl chloride to give tert-butyl (R)-3-(methylsulfonyloxy)pyrrolidine-1-carboxylate (compound 2), which then is reacted with diethylmalonate and a suitable base (e.g., potassium tert-butoxide or sodium ethoxide) to give diethyl (R)-2-(1-(tert-butoxycarbonyl)pyrrolidin-3-yl)malonate (compound 3) with inverted stereochemistry around the chiral carbon.