中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-溴-6-[1,3]二氧烷-2-基-苯并[1,3]间二氧杂环戊烯 | 5-bromo-6-(1,3-dioxolan-2-yl)benzo[d][1,3]dioxolane | 2139-43-7 | C10H9BrO4 | 273.083 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | benzo[d][1,3]dioxole-5,6-dicarbaldehyde | 52302-45-1 | C9H6O4 | 178.144 |
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%.