Literature DB >> 1180892

Decarboxylation of uroporphyrin by heating at atmospheric pressure.

T K With.   

Abstract

Free uroporphyrin is decarboxylated by heating in the air to 150--200 degrees C. Complete decarboxylation occurs after heating to 200 degrees C for 5 min, with a yield of 66--75%. Heptacarboxylic porphyrin can be prepared with a yield of 40% by heating uroporphyrin to 150 degrees C for 60 min, and hexacarboxylic porphyrin with a yield of about 20% by heating to 150 degrees C for 2h.

Entities:  

Mesh：

Substances：

Year:  1975        PMID： 1180892      PMCID： PMC1165437          DOI： 10.1042/bj1470249

Source DB:  PubMed          Journal:  Biochem J        ISSN： 0264-6021            Impact factor:   3.857


  10 in total

1.  Hepta-, hexa-, and pentacarboxylic porphyrins of porphyria cutanea tarda. II. Preparation of the porphyrins by stepwise decarboxylation ofuroporphyrins.

Authors:  T C CHU; E J CHU
Journal:  J Biol Chem       Date:  1959-10       Impact factor: 5.157

2.  Preparation of crystalline porphyrin esters from bovine porphyria urine.

Authors:  T K WITH
Journal:  Biochem J       Date:  1958-04       Impact factor: 3.857

3.  Spectral-absorption coefficients of some porphyrins in the Soret-band region.

Authors:  C Rimington
Journal:  Biochem J       Date:  1960-06       Impact factor: 3.857

4.  The spectrophotometric determination of uroporphyrin.

Authors:  C RIMINGTON; S L SVEINSSON
Journal:  Scand J Clin Lab Invest       Date:  1950       Impact factor: 1.713

5.  Simplified decarboxylation of uroporphyrins.

Authors:  T K With
Journal:  Enzyme       Date:  1974

6.  Sub-uroporphyrins and their occurrence. A preliminary communication.

Authors:  C Rimington; T K With
Journal:  Enzyme       Date:  1974

7.  Preparation of crystalline porphyrin esters and free porphyrins from natural products.

Authors:  T K With
Journal:  Dan Med Bull       Date:  1969-10

8.  Analytical and preparative thin-layer chromatography of porphyrin methyl esters.

Authors:  M Doss
Journal:  Z Klin Chem Klin Biochem       Date:  1970-05

9.  Thin-layer chromatography of free and esterified porphyrins on talc.

Authors:  T K With
Journal:  J Chromatogr       Date:  1969-07

10.  Studies of the uroporphyrins. III. An improved method for the decarboxylation of uroporphyrin.

Authors:  P R EDMONDSON; S SCHWARTZ
Journal:  J Biol Chem       Date:  1953-12       Impact factor: 5.157
  10 in total
  3 in total

1.  Decarboxylation of porphyrinogens by rat liver uroporphyrinogen decarboxylase.

Authors:  A G Smith; J E Francis
Journal:  Biochem J       Date:  1979-11-01       Impact factor: 3.857

2.  High-performance liquid chromatography of coproporphyrin isomers.

Authors:  D J Wright; J M Rideout; C K Lim
Journal:  Biochem J       Date:  1983-02-01       Impact factor: 3.857

3.  Molar absorption coefficients of porphyrin esters in chloroform determined by copper titration.

Authors:  T K With; J S Pedersen
Journal:  Biochem J       Date:  1977-02-01       Impact factor: 3.857
  3 in total

北京卡尤迪生物科技股份有限公司 © 2022-2023.