(7+ Ph-CH-N=N H Ph Ph-N RO2C-C=C-COR +Ph-CH-N=N RO2C COR ①D COR+CH-一N=N COR ⑨DOrganic Chemistry Organic Chemistry Xiamen Xiamen University University





Ph C H N N



+




N N N H H Ph











RO 2 C C C C O 2 R Ph C H N N




+




N N N RO 2 C CO 2 R Ph CO 2 R +















CH N N N N CO 2 R