Synthetic Communications p. 4001 - 4010 (1995)
Update date:2022-08-04
Topics:
Kim
Yoo
Shin
Kim
Park
New stereoisomeric N-bridged heterocycles, 4-oxo-1,3-diazabicyclo-[3.3.0]octanes (4) were synthesized from trans-4-hydroxy-L-proline (1). Thiohydantoins 3 as the key intermediates were prepared by nucleophilic addition of 1 to isothiocyanates, and subsequent cyclization. These thiohydantoins 3 were readily desulfurized to provide 4.
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