An interesting transformation occurs during acylation of 4(R)-hydroxymethyl-3-methyl-1,3-thiazolidine when 4(R)-acylthiomethyl-3-methyl-1,3-oxazolidines are yielded: the reaction competing with O-acylation is controlled by the bulkiness of the acyl group.
当产生4(R)-酰基
硫基甲基-3-甲基-
1,3-恶唑烷时,在4(R)-羟甲基-3-甲基-1,3-
噻唑烷的酰化过程中发生了有趣的转变:与O-酰化竞争的反应由酰基的大体积控制。