作者:B. A. Shainyan、M. V. Ustinov、L. O. Nindakova
DOI:10.1023/a:1013986304683
日期:——
(4S,5S)-4,5-Bis(hydroxymethyl)-2,2-dimethyl-1,3-dioxolane treated with trifluoromethanesulfonyl chloride in pyridine undergoes tandem substitution of one hydroxy group by a triflate group, and the other by pyridinium moiety. In neutral solvents the (4S,5S)-4,5-bis(hydroxymethyl)-2,.2-dimethyl-1,3-dioxolane dilithium salt reacts with trifluoromethanesulfonyl chloride affording both triflates and chlorides and also suffers a cleavage of the dioxolane ring followed by transformations of acyclic products. A triflate cationic complex rhodium cyclooctadiene (4S,5S)-2,3-dihydroxy-1,4-bis(dimethylamino)-2.3-0-isopropylidenebutane was prepared and used as catalyst for hydrogenation of (alpha-acetamidocinnamic and itaconic acids.
翻译:
(4S,5S)-4,5-二(羟甲基)-2,2-二甲基-1,3-二氧杂环戊烷在吡啶中与三氟甲磺酰氯反应,发生协同取代反应,其中一个羟基被三氟甲磺酰基取代,另一个被吡啶𬭩基团取代。在中性溶剂中,(4S,5S)-4,5-二(羟甲基)-2,2-二甲基-1,3-二氧杂环戊烷的二锂盐与三氟甲磺酰氯反应,生成三氟甲磺酸酯和氯化物,并伴随二氧杂环戊烷环的裂解,随后生成的开环产物发生进一步的转变。三氟甲磺酸酯阳离子型铑环辛二烯配合物((4S,5S)-2,3-二羟基-1,4-双(二甲基氨基)-2,3-O-异丙叉丁烷)已被制备,并用作 α-乙酰氨基肉桂酸和衣康酸氢化反应的催化剂。