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Synthesis of C-Methoxy- and C,C’-Dimethoxy-ortho-carboranes
Journal of Organometallic Chemistry ( IF 2.1 ) Pub Date : 2020-09-14 , DOI: 10.1016/j.jorganchem.2020.121523
Marina Yu Stogniy , Svetlana A. Erokhina , Igor B. Sivaev , Vladimir I. Bregadze

a simple way to the synthesis of mono- and disubstituted methoxy derivatives of closo- and nido-carboranes is suggested. C-methoxy- and C-methoxy-C’-methyl-ortho-carboranes were prepared by the treatment of C-hydroxy-ortho-carborane with iodomethane in the presence of sodium hydride in 1,2-dimethoxyethane. C,C’-dimethoxy-ortho-carborane was synthesized from C,C’-dihydroxy-ortho-carborane in the similar way. All methoxy derivatives of closo-carborane were converted to the corresponding nido-carboranes by the deboronation reaction with cesium fluoride. The tetrasubstituted cobalt bis(dicarbollide) complex K[1,1′(2′)-(MeO)2–2,2′(1′)-Me2–3,3′-Co(1,2-C2B9H10)2] was prepared by the reaction of CoCl2 and C-methoxy-C’-methyl-nido-carborane in the presence of t-BuOK in 1,2-dimethoxyethane.



中文翻译:

C-甲氧基和C,C'-二甲氧基-邻氨基甲酸酯的合成

提出了一种简单的合成closo-和nido-carboranes的单和双取代甲氧基衍生物的方法。通过在1,2-二甲氧基乙烷中的氢化钠存在下用碘甲烷处理C-羟基-邻-甲硼烷来制备C-甲氧基-和C-甲氧基-C′-甲基-邻甲硼烷。由C,C′-二羟基-原-甲硼烷以类似的方式合成C,C′-二甲氧基-原-甲硼烷。通过与氟化铯进行脱硼反应,可将closo-carborane的所有甲氧基衍生物转化为相应的nido-carboranes。四取代钴双(双糖脂)配合物K [1,1'(2')-(MeO)2 -2,2'(1')-Me 2 -3,3'-Co(1,2-C 2 B 9小时10分2在1,2-二甲氧基乙烷中,在t-BuOK存在下,通过CoCl 2和C-甲氧基-C'-甲基-氨基-碳烷的反应制备[ α]。

更新日期:2020-09-21
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