Effective synthesis and transformations of Alkyne betulin derivativesстатья
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Дата последнего поиска статьи во внешних источниках: 26 апреля 2016 г.
Аннотация:An effective procedure for the synthesis of terminal acetylene derivatives via reaction of methyl ketones with phosphoryl chloride in pyridine was proposed using triterpene betulin as an example. Bisacetylenic triterpenoid was obtained by oxidative self-coupling of 29-norlup-20(30)-yne-3β,28-diyl diacetate.