中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-羟基-戊-2-炔酸 | 4-hydroxypent-2-ynoic acid | 70404-01-2 | C5H6O3 | 114.101 |
—— | ethyl 4-bromo-2-pentynoate | —— | C7H9BrO2 | 205.051 |
—— | ethyl 4-N-methylcarbamoyloxy-2-pentynoate | —— | C9H13NO4 | 199.207 |
Commercially available ruthenium catalyst, Cp*RuCl(COD), was found to be active in catalyzing Bis-Homo-Diels-Alder [2+2+2] cycloaddition reactions between 1,5-cyclooctadiene and various alkynes giving moderate to good yields (35%–92%). The presence of electron donating groups, especially hydroxyl groups, greatly enhanced the reactivity of the alkyne moiety in the cycloaddition. The reaction was also found to be successful even in the presence of bulky substituents on the alkynes.