Continued from Appendix 1
Appendix 2 Comparison of the numbering of the trivially named porphyrins with numbering based on CNOC/CAS
Appendix 3 Fischer trivial names
A. Porphyrins
B. Bilindiones
Comparison of the Numbering of the Trivially Named Porphyrins(TNP) with Numbering Based on CNOC/CAS
TNP Trivial Name | Numbering Basis | 2 | 3 | 7 | 8 | 12 | 13 | 15 | 17 | 18 | 20 | |
1. | Uroporphyrin I | TNP CNOC/CAS | Cm Cet | Cet Cm | Cm Cet | Cet Cm | Cm Cet | Cet Cm | - - | Cm Cet | Cet Cm | - - |
2. | Coproporphyrin II | TNP CNOC/CAS | Me Cet | Cet Me | Cet Me | Me Cet | Me Cet | Cet Me | - - | Cet Me | Me Cet | - - |
3. | Etioporphyrin I | TNP CNOC/CAS | Me Et | Et Me | Me Et | Et Me | Me Et | Et Me | - - | Me Et | Et Me | - - |
4. | Etioporphyrin II | TNP CNOC/CAS | Me Et | Et Me | Et Me | Me Et | Me Et | Et Me | - - | Et Me | Me Et | - - |
5. | Etioporphyrin III | TNP CNOC/CAS | Me Et | Et Me | Me Et | Et Me | Me Et | Et Me | - - | Et Me | Me Et | - - |
6. | Etioporphyrin IV | TNP CNOC/CAS | Me Et | Et Me | Me Et | Et Me | Et Me | Me Et | - - | Et Me | Me Et | - - |
7. | Cytoporphyrin | TNP CNOC/CAS | Me Cet | Me | Me Vn | Vn Me | Me | Cet Me | - - | Cet | Cet | - - |
8. | Protoporphyrin | TNP CNOC/CAS | Me Cet | Vn Me | Me Vn | Vn Me | Me Vn | Cet Me | - - | Cet Me | Me Cet | - - |
9. | Mesoporphyrin | TNP CNOC/CAS | Me Cet | Et Me | Me Et | Et Me | Me Et | Cet Me | - - | Cet Me | Me Cet | - - |
10. | Hematoporphyrin | TNP CNOC/CAS | Me Cet | Me | Me | Me | Me | Cet Me | - - | Cet Me | Me Cet | - - |
11. | Deuteroporphyrin | TNP CNOC/CAS | Me Cet | - Me | Me Me | - - | Me Me | Cet - | - - | Cet Me | Me Cet | - - |
12. | Rhodoporphyrin | TNP CNOC/CAS | Me Cet | Et Me | Me Me | Et Et | Me Me | Et | - - | Cet Me | Me | - - |
13. | Pyrroporphyrin | TNP CNOC/CAS | Me Cet | Et Me | Me Me | Et Et | Me Me | - Et | - - | Cet Me | Me - | - - |
14. | Phylloporphyrin | TNP CNOC/CAS | Me Cet | Et Me | Me Me | Et Et | Me Me | - Et | Me - | Cet Me | Me - | - Me |
R1 =
Cm = -CH2COOH
Cet = -CH2CH2COOH
CNOC = IUPAC Commission on Nomenclature of Organic Chemistry
CAS = Chemical Abstracts Service
Note: Cet and Cm are often abbreviated to P and A. This is acceptable provided these are defined as CH2CH2CO2H and CH2CO2H respectively.
Fischer trivial names
The following extensions to the list of accepted trivial names are proposed as permitted: they encompass a further selection of trivial names due to Hans Fischer. They each refer to a single compound and must not be used as a basis for semisystematic nomenclature.
The names are illustrated for isomers of mesoporphyrin, but may also be used for deuteroporphyrin (for Et read H), haematoporphyrin (for Et read -CH(OH)CH3) and protoporphyrin (for Et read -CH=CH2).
The names all carry a Roman numeral. The name without such a numeral is already defined in Table 2, and corresponds to isomer IX in the Fischer scheme. The Roman numerals here do not mean the same as those employed in the trivial names in Table 3. Both systems are referred to as "type numbering". The start point and sequence of locant numbering used by Fischer are retained (although the locant numbers follow the 1-24 system, TP-1.2).
Comparison of the Numbering of the Fischer Trivially Named Porphyrins (TNP) with Numbering Based on CNOC/CAS Numbering Principles. Cm = -CH2COOH; Cet = -CH2CH2COOH; CNOC = IUPAC Commission on the Nomenclature of Organic Chemistry; CAS = Chemical Abstracts Service.
Thus mesoporphyrin VI is
The following Fischer trivial names for bile pigments are permitted. Each refers to a single compound, and must not be used as the basis for semisystematic nomenclature. They each have a Roman numeral and a Greek letter as suffixes: the Roman numeral refers to the porphyrin structure (tabulated above) which has been formally broken at the meso bridge denoted by the Greek letter (Fischer numeration, Fig. 1). The structures and names have already been referred to in TP-6.3 and TP-6.4 and are:
biliverdin IIIα, biliverdin IXα (= biliverdin), biliverdin IX, biliverdin IXγ, biliverdin IXδ, biliverdin XIIIα, together with the corresponding hydrogenated derivatives (e.g. bilirubins, mesobiliverdins).
The names without a Roman numeral and Greek letter are already defined in Fig. 16-22: in each case the IXα isomer is implied. For convenience the structures of the biliverdin isomers mentioned in the previous paragraph are tabulated below.
Roman Numeral Designation | Substituents at Positions | |||||||
2 | 3 | 7 | 8 | 12 | 13 | 17 | 18 | |
IXα | Me | Vn | Me | Cet | Cet | Me | Me | Vn |
IXβ | Me | Cet | Cet | Me | Me | Vn | Me | Vn |
IXγ | Cet | Me | Me | Vn | Me | Vn | Me | Cet |
IXδ | Me | Vn | Me | Vn | Me | Cet | Cet | Me |
IIIα | Vn | Me | Me | Cet | Cet | Me | Me | Vn |
XIIIα | Me | Vn | Me | Cet | Cet | Me | Vn | Me |