Sodium hydride → 6-t-Butoxycarbonylamino-4-N-(carbomethoxymethyl)-perhydro-1,4-thiazepin-5-one

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Reaction Steps

6-t-Butoxycarbonylamino-perhydro-1,4-thiazepin-5-one (0.1 g) and methyl iodoacetate (0.1 g) are dissolved in 1 ml of THF. Sodium hydride (50% suspension in oil) is added in batches. After one hour at room temperature, the reaction is quenched with 2 ml of 10% ammonium chloride solution. The crude product is extracted into methylene chloride, and subsequently chromatographed on silica gel (40:1 chloroform-methanol) to yield the pure product (0.09 g). The NMR spectrum is consistent with the assigned structure. A sample is obtained by recrystallization from ether-methanol and analyzes for C13H22N2O5S.

Provenance & Evidence