论文 Cyclobutenone Ethylenedithioacetals and their Ready Electrocyclic Ring opening a Synthesi and 随后开环 Cyclobutenone Ethylen d Regenhardt, Wilko ithioacetals Ernst Schaumann,* a Harold W. Moore* ba Institut fur Organische Chemie, Technische Universitat Clausthal, Leibnizstrase 6, 38678 Clausthal- Zellerfeld,德国传真 +49(5323)722858;电子邮件:ernst.schaumann@tu-clausthal.de b 加州大学欧文分校化学系,欧文,CA 92697–2025,美国 传真
Synthesis and reactivity of compounds with cyclobutane ring(s). 11. [2 + 2] Cycloadditions of tetraalkoxyethylenes with ketenes: a general route to 2-substituted 1-hydroxycyclobut-1-ene-3,4-diones