1-tert-Butoxycarbonyl-1-tosyl-hydrazine as reagent for the synthesis of substituted hydrazines with a secondary alkyl group
作者:Leif Grehn、Ulf Ragnarsson
DOI:10.1016/s0040-4020(99)00156-8
日期:1999.4
suppressed in comparison with that of non- or monoacylated hydrazines, it reacted under various conditions with a representative set of ketones to give the corresponding hydrazones in high yields. The aliphatic hydrazones were readily reduced to hydrazines with NaBH4, whereas the aromatic analogues for smooth reduction required the more powerful NaBH3CN. With one exception all the new compounds were crystalline
1-Boc-1-Ts-2-Z-肼的催化氢解提供了1-Boc-1-Ts-肼,为稳定的结晶固体。尽管与非酰化或单酰化肼相比,它的亲核性得到了显着抑制,但它在各种条件下与一组代表性的酮反应,以高收率得到相应的。脂族易于用NaBH 4还原为肼,而要平滑还原的芳族类似物则需要更强大的NaBH 3。CN。除了一个例外,所有这些新化合物在正常条件下均为结晶且稳定。新试剂和烷基化衍生物对活化的异氰酸酯保持令人满意的反应性,以提供酰基脲。简要讨论了这些新型化合物的NMR和IR光谱的某些特征。