Abstract
1. Methyl retinoate has been converted into methyl 5,6-monoepoxyretinoate by reaction with monoperphthalic acid. The epoxy acid ester on alkaline hydrolysis gave 5,6-monoepoxyretinoic acid. 2. Treatment of the 5,6-monoepoxy compounds with ethanolic hydrochloric acid gave the corresponding 5,8-epoxy (furanoid) compounds. 3. With lithium aluminium hydride, the acid and the ester groups were selectively reduced to primary alcohols. 4. Administration of methyl 5,6-monoepoxyretinoate intraperitoneally and subcutaneously had good growth response in vitamin A-deficient rats. 5. 5,6-Monoepoxyretinoic acid, when given intraperitoneally as the sodium salt, was 157% as active as all-trans-retinyl acetate. 6. Methyl 5,6-monoepoxyretinoate was hydrolysed to the epoxy acid by rat-liver homogenate. It had 35% of the biological activity of all-trans-retinyl acetate in the rat when given orally.
Full text
PDF




Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Ames S. R. Bioassay of vitamin A compounds. Fed Proc. 1965 Jul-Aug;24(4):917–923. [PubMed] [Google Scholar]
- DUNAGIN P. E., Jr, ZACHMAN R. D., OLSON J. A. IDENTIFICATION OF FREE AND CONJUGATED RETINOIC ACID AS A PRODUCT OF RETINAL (VITAMIN A ALDEHYDE) METABOLISM IN THE RAT IN VIVO. Biochim Biophys Acta. 1964 Aug 19;90:432–434. doi: 10.1016/0304-4165(64)90218-1. [DOI] [PubMed] [Google Scholar]
- Dowling J. E., Wald G. THE BIOLOGICAL FUNCTION OF VITAMIN A ACID. Proc Natl Acad Sci U S A. 1960 May;46(5):587–608. doi: 10.1073/pnas.46.5.587. [DOI] [PMC free article] [PubMed] [Google Scholar]
- JOHN K. V., LAKSHMANAN M. R., JUNGALWALA F. B., CAMA H. R. SEPARATION OF VITAMINS A1 AND A2 AND ALLIED COMPOUNDS BY THIN-LAYER CHROMATOGRAPHY. J Chromatogr. 1965 Apr;18:53–56. doi: 10.1016/s0021-9673(01)80319-8. [DOI] [PubMed] [Google Scholar]
- JUNGALWALA F. B., CAMA H. R. PREPARATION AND PROPERTIES OF 5,6-MONOEPOXYVITAMIN A ACETATE, 5,6-MONOEPOXYVITAMIN A ALCOHOL, 5,6-MONOEPOXYVITAMIN A ALDEHYDE AND THEIR CORRESPONDING 5,8-MONOEPOXY (FURANOID) COMPOUNDS. Biochem J. 1965 Apr;95:17–26. doi: 10.1042/bj0950017. [DOI] [PMC free article] [PubMed] [Google Scholar]
- JUNGALWALA F. B., CAMA H. R. Separation of vitamins A1, A2 and allied substances by reverse phase paper chromatography. J Chromatogr. 1962 Aug;8:535–536. doi: 10.1016/s0021-9673(01)99306-9. [DOI] [PubMed] [Google Scholar]
- LAKSHMANAN M. R., JUNGALWALA F. B., CAMA H. R. METABOLISM AND BIOLOGICAL POTENCY OF 5,6-MONOEPOXYVITAMIN A ALDEHYDE IN THE RAT. Biochem J. 1965 Apr;95:27–34. doi: 10.1042/bj0950027. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lakshmanan M. R., Cama H. R. Studies on the visual pigment and the indicator yellow analogues formed from 5,6-monoepoxyretinal. Biochem J. 1966 Apr;99(1):87–92. doi: 10.1042/bj0990087. [DOI] [PMC free article] [PubMed] [Google Scholar]
- MALATHI P., RAO K. S., SASTRY P. S., GANGULY J. Studies on metabolism of vitamin A. 1. The biological activity of vitamin A acid in rats. Biochem J. 1963 May;87:305–311. doi: 10.1042/bj0870305. [DOI] [PMC free article] [PubMed] [Google Scholar]
- MURRAY T. K. Potency of vitamin A acid in the vaginal smear assay. Proc Soc Exp Biol Med. 1962 Dec;111:609–611. doi: 10.3181/00379727-111-27869. [DOI] [PubMed] [Google Scholar]
- Olson J. A. The biosynthesis and metabolism of carotenoids and retinol (vitamin A). J Lipid Res. 1964 Jul;5(3):281–299. [PubMed] [Google Scholar]
- WOLF G., BERGAN J. G., SUNDARESAN P. R. Vitamin A and mucopolysaccharide biosynthesis by cell-free particle suspensions. Biochim Biophys Acta. 1963 Mar 5;69:524–532. doi: 10.1016/0006-3002(63)91303-9. [DOI] [PubMed] [Google Scholar]
- Zile M., Deluca H. F. A biologically active metabolite of retinoic acid from rat liver. Biochem J. 1965 Oct;97(1):180–186. doi: 10.1042/bj0970180. [DOI] [PMC free article] [PubMed] [Google Scholar]
