scheme28

Scheme 28. 4CzIPN/Co-dual catalyzed reductive cyclization of alkynals with H2O. 4CzIPN: 2,4,5,6-tetra(9H-carbazol-9-yl) isophthalonitrile.

Scheme 28. 4CzIPN/Co-dual catalyzed reductive cyclization of alkynals with H2O. 4CzIPN: 2,4,5,6-tetra(9H-carbazol-9-yl) isophthalonitrile.
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