中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-甲酰基苯并[1,3]二恶茂-4-甲酸乙酯 | 5-Formyl-benzo[1,3]dioxole-4-carboxylic acid ethyl ester | 75267-17-3 | C11H10O5 | 222.197 |
—— | (4-hydroxymethyl-benzo[1,3]dioxol-5-yl)methanol | 1077-75-4 | C9H10O4 | 182.176 |
5-溴-1,3-苯并二氧杂环戊二烯-4-甲醛 | 5-bromo-benzo[1,3]dioxole-4-carbaldehyde | 72744-54-8 | C8H5BrO3 | 229.03 |
—— | 4-Diethoxymethyl-1,3-benzdioxol-5-carbaldehyd | 109548-08-5 | C13H16O5 | 252.267 |
Four phthalazine derivatives have been prepared from substituted 2-bromobenzaldehyde acetals by a sequence involving: (1) lithiation and formylation; (2) deprotection; and (3) condensative cyclization with hydrazine. Two additional phthalazines were prepared by a similar sequence following direct lithiation of benzaldehyde acetals substituted by anion-stabilizing groups at C3. These syntheses can be conveniently carried out to give phthalazines in overall yields of 40–70%.