synthesis of benzopyrano[2,3-d]pyrimidines using silica-bonded n-propyldiethylenetriamine sulfamic acid (spdtsa) as heterogeneous solid acid catalyst under solvent-free conditions

Authors

khodabakhsh niknam

nassim - borazjani

abstract

silica-bonded n-propyldiethylenetriamine sulfamic acid (spdtsa) is employed as a recyclable heterogeneous solid acid catalyst for the synthesis of benzopyrano[2,3-d]pyrimidines through one-pot condensation reaction of salicylaldehydes, malononitrile and secondary amines at room temperature under solvent-free conditions. spdtsa showed much the same efficiency when used in consecutive reaction runs.

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Journal title:

organic chemistry research

Publisher: iranian chemical society

ISSN

volume 1

issue 1 2015

Keywords

[ ' b e n z o p y r a n o [ 2 ' , 3 , ' d ] p y r i m i d i n e s ' , ' h e t e r o g e n e o u s c a t a l y s t s ' , ' s o l i d a c i d s ' , ' s y n t h e s i s ' , ' s o l v e n t ' , ' f r e e c o n d i t i o n s ' ]

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