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CYCLIZATION PROCEDURES TOWARD THE SYNTHESIS OF SOME CONFORMATIONALLY RESTRICTED NITROGEN HETEROCYCLESDOI: 10.4067/S0366-16442002000100006 Keywords: bischler-napieralsky, tsuda, nitrogen heterocycles, cyclization, isoquinolones, isoquinolines. Abstract: an attempt was made to synthesize conformationally restricted nitrogen heterocycles by means of the bischler-napieralski reaction and tsuda modification. observed results prompted us to speculate on the nature of the effects which may be controlling such cyclization processes
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