Palladium-catalysed transformation of readily available mixed carbonates 1a–l gives rise to a variety of allenic polyunsaturated aldehydes and ketones 2a–l. These carbonyls were sometimes contaminated with minor amounts of the undesired acetylenic regioisomers 3, and could be purified by silicagel chromatography.
钯催化的现成混合
碳酸盐1a–l的转化产生了多种烯丙基多不饱和醛和酮2a–l。这些羰基有时被少量的不希望的炔属区域异构体3污染,可以通过
硅胶色谱法纯化。