Jd. Kim et al., Novel synthetic method for N-allylcarbamates from allyl ethers using chlorosulfonyl isocyanate, TETRAHEDR L, 41(26), 2000, pp. 5073-5076
Various allyl ethers were converted into the corresponding N-allylcarbamate
s using chlorosulfonyl isocyanate (CSI) via the stable allylic carbocation
rather than beta-lactam through [2+2] cycloaddition. The reaction of cinnam
yl methyl ether with CSI afforded only methyl N-cinnamyloarbamate at 0 degr
ees C, but at 20 degrees C, it produced a mixture of methyl N-cinnamylcarba
mate and methyl N-(1-phenylprop-2-enyl)carbamate in a 2.7:1 ratio. (C) 2000
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