6-APA

6-APA is the chemical compound (+)-6-aminopenicillanic acid.[1]

6-Aminopenicillanic acid
Names
IUPAC name
(2S,5R,6R)-6-Amino-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.008.177
EC Number
  • 208-993-4
UNII
Properties
C8H12N2O3S
Molar mass 216.26 g·mol−1
Appearance white powder
Melting point 198 °C (388 °F; 471 K)
Boiling point 207 °C (405 °F; 480 K) decomp
0.4 g/100 mL
log P 0.600
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Use

6-APA is the core of penicillins. It is obtained from the fermentation brew of the Penicillium mold and used as the main starting block for the preparation of numerous semisynthetic penicillins.

History

In 1958, Beecham scientists in the UK discovered the penicillin nucleus, 6-APA. From that starting material, a large number of new semisynthetic penicillins could be designed, whose activity was directed against problem infections.[2]

References
  1. Batchelor, F. R.; Doyle, F. P.; Nayler, J. H. C.; Rolinson, G. N. (1959). "Synthesis of Penicillin: 6-Aminopenicillanic Acid in Penicillin Fermentations". Nature. 183 (4656): 257–258. Bibcode:1959Natur.183..257B. doi:10.1038/183257b0. PMID 13622762.
  2. F.P. Doyle, J.H.C. Nayler, G.N. Rolinson US Patent 2,941,995, filed July 22, 1958, granted June 21, 1960. Recovery of solid 6-aminopenicillanic acid.

See also
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