High-valent tin(IV) porphyrin, SnIV(TPP)(BF4)2, as an efficient catalyst for the ring-opening of epoxides

Magnetically separable nano CuFe2O4: an efficient and reusable heterogeneous catalyst for the green synthesis of thiiranes from epoxides with thiourea

“…In addition, the efficiency of our synthetic method was highlighted by comparing some of our results with the previously reported methods [16][17][18][19][20][21] (Table 4). A case study shows that the present procedure is more efficient than the reported methods.…”

“…[4][5][6][7] Transformation of epoxides to thiiranes by an oxygen-sulfur exchange reaction is an efficient method and has been achieved with different procedures using sulfur transferring agents. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] However, some of these methods suffer from disadvantages such as long reaction times, the use of unrecoverable catalyst, low yield of the products, difficult workup procedures, use of highly acidic catalysts, rapid increase of pH during the reaction, and the formation of polymeric by-products. The development and introduction of convenient catalytic procedures, facile recovery of the catalyst from the reaction medium and recyclability of the catalyst are very significant tasks in new synthetic chemistry.…”

Highly efficient chemical fixation of carbon dioxide catalyzed by high-valent tetraphenylporphyrinatotin(IV) triflate

“…In continuation of our works on the use of tetraphenylporphyrinatotin(IV) perchlorate [26,27], tetraphenylporphyrinatotin (IV) trifluoromethanesulfonate [28][29][30], and tetraphenylporphyrinatotin (IV) tetrafluoroborate [31][32][33] in organic transformations, in the present work, we report an efficient method for chemical fixation of carbon dioxide with epoxides catalyzed by electron-deficient [Sn IV (TPP)(OTf) 2 ] at ambient pressure and temperature (Scheme 1).…”

Rapid, highly efficient and chemoselective trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS) catalyzed by reusable electron‐deficient tin(IV)porphyrin

“…They used Cr(tpp)Cl for regioselective [3,3] rearrangement of aliphatic allyl vinyl ethers and for Claisen rearrangement of simple aliphatic allyl vinyl ethers, Fe(tpp)OTf for rearrangement of α,β-epoxy ketones into 1,2-diketones and Cr(tpp)OTf for highly regio-and stereoselective rearrangement of epoxides to aldehydes. [33 -36] Recently, we have reported the use of tin(IV)tetraphenylporphyrinato perchlorate, [37,38] tin(IV)tetraphenylporphyrinato trifluoromethanesulfonate [39,40] and tin(IV)tetraphenylporphyrinato tetraflouroborate [41,42] in organic transformations.…”