A new method for the synthesis of thiophenophanes which consists of cyclization of bischloroacetyl compounds with sodium sulfide and condensation of the resulting keto sulfides with glyoxal was developed. As an application a series of [n.1.1]paracyclo(2,5)thiophenoparacyclophanes (n=3,4,5,6,7,8,10) were synthesized.
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Miyahara et al. (1978) studied this question.
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