The reaction of 3-(l-bromobenzyl)coumarin 3 with trialkyl phosphites afforded in good yields the corresponding dialkyl phosphonates 5, the Arbuzov reaction products. The interaction of trialkyl phosphites with 3-(co-bromoacetyl)coumarin 4 gave the corresponding dialkyl vinylphosphates 8 as the only
Some new reactions of coumarins
โ Scribed by I. I. Tkach; E. A. Luk'yanets
- Publisher
- Springer US
- Year
- 1992
- Tongue
- English
- Weight
- 217 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0009-3122
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๐ SIMILAR VOLUMES
Several methods are available for the synthesis of coumarin ring systeml. We nQy report a new method for the synthesis of coumarins by oxidative cyclisation of some substituted 2allylphenols by 2,3=dichloro-5,6-dicyano-1,4-bensoguinone 0). 7-Allyloxy-3-methylflavone2 on Claisen rearrangement b vacu
organic memlcrl Rerear& section, Iaderle Laboratorfcr a Divlrion of American Cymmld Ccqany, Pearl River, I. I. (lteo.i~~I 31 JanUr.v 1966) Recently a number of addition reactlonr or @otochemlcally exoited moleculee to sxtq~~@eculas bon& hrve been dercribed (1). We would like to repox+ the renritizxM