(R)-3-ethynyl-3-hydroxy-1-methylpyrrolidin-2-one → HCID 86693412, compound

Participants

Reaction Steps

Methyl 9-bromo-4-oxo-[1]benzoxepino[5,4-d]thiazole-2-carboxylate (0.37 g) was subjected to General Procedure 0 to afford 280 mg (75%) of methyl 9-bromo-4-hydroxy-4,5-dihydro-[1]benzoxepino[5,4-d]thiazole-2-carboxylate. Methyl 9-bromo-4-hydroxy-4,5-dihydro-[1]benzoxepino[5,4-d]thiazole-2-carboxylate (128 mg) was reacted with (3R)-3-ethynyl-3-hydroxy-1-methyl-pyrrolidin-2-one similarly to as described in General Procedure F with non-critical modifications to afford methyl 4-hydroxy-9-[2-[(3R)-3-hydroxy-1-methyl-2-oxo-pyrrolidin-3-yl]ethynyl]-4,5-dihydro-[1]benzoxepino[5,4-d]thiazole-2-carboxylate which was directed subjected to General Procedure M to afford 25 mg and 7.9 mg (26% overall yield) after reverse phase purification then chiral separation. The absolute stereochemistry at the 4-hydroxyl substitution position for each isomer was not determined.

Provenance & Evidence