The disodium salt of enantiomerically pure dimeric Λ-cobalt(III) complex 1 was prepared in one-pot from sodium triscarbonatocobaltate(III) and Schiff base ligand (Ra,S,S)-2 formed by the condensation of (R)-3,3ʹ-diformyl-2,2ʹ-dihydroxy-1,1ʹ-binaphthyl 3 with (S)-tert-leucine 4. Preliminary screening of 1 as a chiral catalyst was conducted for the bromocyclization of a tryptamine derivative.

中文翻译：

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阴离子构型的Λ构型光学纯双核钴（III）配合物的制备

对映体纯的二聚Λ-钴（III）配合物1的二钠盐是从一碳酸三钠钴（III）和席夫碱配体（R a ，S ，S ）-2（由（R ）- 3,3 ' -diformyl -2,2 ' -二羟基-1,1 '联萘3与（小号） -叔-亮氨酸4 。初步筛选了1作为手性催化剂，以实现色胺的衍生物的溴环化。