作者:Tian-pa You、Xue-song Wu、Shuang-zheng Lin、Ming-zong Li
DOI:10.1055/s-0029-1217174
日期:——
Using 5 mol% of proline as a recoverable catalyst, 9-phenanthrols react with formaldehyde at room temperature, through Mannich bases and 10-methylene-9-phenanthrone intermediates, to form a new class of spirophenanthrones.