## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Regioselective Synthesis of 6-Alkyl- and 6-Prenylpolyhydroxyisoflavones and 6-Alkylcoumaronochromone Derivatives.
β Scribed by Masao Tsukayama; Hironari Wada; Yasuhiko Kawamura; Kazuyo Yamashita; Masaki Nishiuchi
- Publisher
- John Wiley and Sons
- Year
- 2005
- Weight
- 30 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0931-7597
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## Abstract magnified image Facile methods were developed to prepare a series of 6βphenyl and 6βalkylβ2,4βdiaminopyrimidine derivatives. The pyrimidine ring of the final products was constructed by treatment of a 1,3βdicarbonyl derivative with an amidine or guanidine. The 6βphenylβpyrimidine deriva
1 -Methyl-5-aminopyrazole can be tosylated t o give ( 4 ) , R = CH3, m.p. 188-190Β°C, the structure of which has been substantiated by the characteristic position of its sulfonyl absorption [5] in the infrared and by the synthesis [4] of