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Cyclization agents/cyclizations zinc chloride

Fischer indole synthesis. The synthesis of a 2-substituted indole by the method of Fischer " can be interpreted as shown in the formulation. An Organic Syntheses preparation of 2-phenylindole specified heating acetone phenylhydrazone with five times its weight of zinc chloride al 170° and adding 4 parts of sand to prevent solidification on cooling (yield of 2-phenyllndole 72-HO%). Chapman el /. studied various cyclizing agents (coped, hydrochloric acid, dry HCI, BFn. polyphosphoric... [Pg.648]

See other pages where Cyclization agents/cyclizations zinc chloride is mentioned: [Pg.43]    [Pg.411]    [Pg.856]    [Pg.411]    [Pg.856]    [Pg.15]    [Pg.89]    [Pg.410]    [Pg.184]    [Pg.248]   
See also in sourсe #XX -- [ Pg.212 ]



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Cyclization agents/cyclizations

Cyclization agents/cyclizations chloride

Zinc chloride

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