Alizarin Alkyl

Sommelet, 30, 67 Alizarin indicator, 37, 33 Alkylation, of acetylene, 30, 15 of aniline with triphenylcarbinol, 30, 5 of e-caprolactam with dimethyl sulfate,... 

Alizarin, 981 Alkyd resins, 1018 Alkyl borates, 302 Alkyl bromides, 270 Alkyl chlorides, 270 Alkyl fluorides, 272 Alkyl halides, 270... 

Alizarin 8.1p, 9.5Ap, 13.6Dp Alizarinprimeveraside 12. Ip. Alkannin 5.7C, 9.3Fp, 9.3Gp. Alkyl-acetyl-glyceryl-phosphorocholine 5.7Gn Alkyl-isothiocyanates 13.8ZP Alkyl-lysophospholipid 8. In Allethrin I 4.2n Allethrin II 4.2n... 

The hydroxyl-hydrogen atoms of alizarin may be replaced by alcohol and acid radicals. The alkyl derivatives are easily obtained by heating alizarin with the requisite alkyl iodide in presence of caustic alkali. Mono- and di-derivatives may he obtained in this manner [5, 6]. 

Partial acetylation of phenols containing a peri hydroxy-carbonyl system is attained using boracetic anhydride [123] and a typical application is the preparation of digitolutein (67) from 3-methyl-alizarin (65) [6]. The reaction proceeds via the cyclic triacetate (66) from which the boracetate group is removed by hydrolysis with water. This synthesis also illustrates the differential lability of acyl and alkyl phenols towards base and its normal application in the preparation of partially alkylated phenols (see also 70). 

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