phase, result in efficient releases of orthogonally bis-protected or fully tris-protected hydrazine derivatives. A comparison between liquid and solid phase syntheses is outlined: even if the overall yields are sometimes rather higher by the liquid phase synthesis, the on-resin protocol is much more rapid and convenient than the liquid protocol.
已经开发了手性α-
肼基酸的第一固相合成。该合成通过制备在涉及α-羟基酯的Mitsunobu方案中用作酸性伙伴的固体负载的N-烷氧基羰基-
氨基邻苯二甲
酰亚胺来实现。首先在液相中进行的
邻苯二甲酰基的两个不同的最终反保护步骤导致正交双保护或完全三保护的
肼衍
生物的有效释放。概述了液相和固相合成之间的比较:即使通过液相合成有时总产率有时会更高,但
树脂上的操作方案比液相操作要快得多且方便得多。