Sulfamic acid-functionalized NaY zeolite as a reusable solid catalyst for formylation of amines

Formamides are considered as valuable intermediates in the production of various pharmaceuticals [1,2,3]. The transformation of primary and secondary amines leads to useful products that are applicable as polar solvents [4,5]. the reported methods have several disadvantages such as expensive and toxic formylating reagents and catalysts, long reaction times, high temperature, low yields, production of side products, environmental pollution caused by using non green solvents, tedious work up, complex isolation and recovery procedures. Here in we assume immobilization of sulfamic acid on the outside of NaY zeolite surface can increase catalyst activity. So, in continuation of our recent studies on application of heterogeneous catalysts [8] we hereby report a new protocol for preparation of sulfamic acid- functionalized NaY zeolite (SA-NaY) for the first time and its application in synthesis of N-formylamines as an efficient and reusable heterogeneous catalyst.