通过3-乙酰基-2 H-环庚[ b ]呋喃-2-酮与原位生成的烯胺反应,制得1-乙酰基azulene和3-甲基-,3-乙基-和3-丙基取代的1-乙酰基azulenes。从醛和胺中提取。在乙醇钠的存在下,这四个1-乙酰基azulenes与2-氨基苯甲醛及其4,5-二甲氧基和4,5-亚甲基二氧基取代的衍生物反应,得到十二个1-(2-喹啉基)azulenes。以类似的方式,还从2-乙酰基氮杂烯制备了三个2-(2-喹啉基)氮杂烯。
Synthesis of 1-(2-benzofurancarbonyl)azulenes using 1-(bromoacetyl)azulenes as new building blocks
作者:Satoko Yamashiro、Kimiaki Imafuku
DOI:10.1002/jhet.5570390411
日期:2002.7
afford 1-acetyl-3-bromoazulene (3) and 3-bromo-1-(bromoacetyl)azulene (4). In a similar manner, 3-methyl-, 3-ethyl-, 3-propyl-, and 3-methoxycarbonyl-substituted 1-acetylazulenes 2a-d gave the corresponding 3-substituted 1-(bromoacetyl)azulenes 5a-d as major products and 1-(dibromoacetyl)azulenes 6a-d as minor ones. The 1-(bromoacetyl)azulenes 5a-d are useful as new building blocks. Compounds 5a-d reacted
were prepared by the reaction of 3-acetyl-2H-cyclohepta[b]furan-2-one with in situ generated enamines from aldehydes and amines. These four 1-acetylazulenes reacted with 2-aminobenzaldehyde and its 4,5-dimethoxy- and 4,5-methylenedioxy-substituted derivatives in the presence of sodium ethoxide to afford twelve 1-(2-quinolyl)azulenes. In a similar manner, three 2-(2-quinolyl)azulenes were also prepared
通过3-乙酰基-2 H-环庚[ b ]呋喃-2-酮与原位生成的烯胺反应,制得1-乙酰基azulene和3-甲基-,3-乙基-和3-丙基取代的1-乙酰基azulenes。从醛和胺中提取。在乙醇钠的存在下,这四个1-乙酰基azulenes与2-氨基苯甲醛及其4,5-二甲氧基和4,5-亚甲基二氧基取代的衍生物反应,得到十二个1-(2-喹啉基)azulenes。以类似的方式,还从2-乙酰基氮杂烯制备了三个2-(2-喹啉基)氮杂烯。