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首页> 外文期刊>Chemistry: A European journal >Diastereo-and Enantioselective Synthesis of Organometallic Bis(helicene)s by a Combination of C-H Activation and Dynamic Isomerization
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Diastereo-and Enantioselective Synthesis of Organometallic Bis(helicene)s by a Combination of C-H Activation and Dynamic Isomerization

机译：C-H活化与动态异构化相结合的非对映和对映选择性合成有机金属双（螺旋）

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摘要

Homochiral and heterochiral cis-bis-cycloplatinated-[6]helicene derivatives 1b~(1,2), as representative examples of platina[6]helicenes that share a common platinum center, have been prepared. A diastereo-and enantioselective synthesis, which combines CH activation and dynamic isomerization from heterochiral structure 1b~2 into homochiral structure 1b~1, is also described. Overall, this isomerization process results in the transfer of chiral information from one helicene moiety to the other one. The chiroptical properties of homochiral (P)-and (M)-1b~1 were greatly modified upon oxidation into their corresponding (P)-and (M)-diiodo-Pt~(IV) complexes (5). The changes were also analyzed by performing theoretical calculations. C-H activation in the synthesis of organometallic helicenes is further demonstrated by the preparation of cis-bis-cycloplatinated-[8]helicene 1c.
机译：制备了手性和杂手性的顺式-双-环-环-铂-[6]螺旋衍生物1b〜（1,2），作为共有一个铂中心的铂[6]螺旋的代表性例子。还描述了非对映和对映选择性合成，其将CH活化和从异手性结构1b〜2动态异构化为同手性结构1b〜1。总的来说，这种异构化过程导致手性信息从一个螺旋烯部分转移到另一个螺旋烯部分。同手性（P）-和（M）-1b〜1的手性在氧化成相应的（P）-和（M）-二碘-Pt〜（IV）配合物后得到了很大的修饰（5）。通过执行理论计算也分析了这些变化。有机金属螺旋烯合成中的C-H活化进一步通过制备顺-双环铂化-[8] ic烯1c来证明。

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