4458-65-5Relevant academic research and scientific papers
REACTION ON SOLID SUPPORT PART V: THE MECHANISM OF OXIDATION OF α-METHYLPYRROLES TO α-FORMYLPYRROLES BY TALLIUM NITRATE ON CLAY
Jackson, Anthony H.,Nagaraja Rao, K. R.,Smeaton, Elizabeth
, p. 2673 - 2676 (2007/10/02)
Evidence is presented to show that the clay-catalyzed thallium nitrate oxidation of α-methylpyrroles to α-formylpyrroles involves formation of an intermediate nitrate ester which subsequently undergoes elimination of nitrite.
Cyclizations of Terminally Substituted a,c-Biladiene Salts to give meso-Substituted Porphyrins
Smith, Kevin M.,Pandey, Ravindra K.
, p. 1229 - 1236 (2007/10/02)
Cyclizations of 1',8'-disubstituted a,c-biladiene salts using copper(II) salts afford the corresponding meso-substituted porphyrins (after removal of copper) along with smaller amounts of the corresponding meso-unsubstituted analogues.For example, the a,c
Carbon-5 Regiospecific Synthesis of Deuteroporphyrin IX
Rezzano, Irene,Buldain, Graciela,Frydman, Benjamin
, p. 3059 - 3063 (2007/10/02)
Benzyl 3-(ethoxycarbonyl)-4-methyl-2-pyrrolecarboxylate was formylated with dimethylformamide (DMF)-phosphorous oxychloride, and the 5-formylpyrrole was obtained in 50percent yield.It was reduced with sodium borohydride to the alcohol, which was condensed with benzyl 3-methyl-4-(ethoxycarbonyl)-2-pyrrolecarboxylate to afford dibenzyldipyrrylmethane in good yield.The latter was transformed into its 5,5'-diformyl derivative which when condensed with bis-4-methylpyrryl>methane afforded the 3,8-bis(ethoxycarbonyl)deuteroporphyrin IX dimethyl ester in 40percent yield.Decarboxylation of the latter in hot hydrochloric acid gave deuteroporphyrin IX (isolated as its dimethyl ester) in 50percent yield.
