A Thermolytic Azulene Synthesis from Dimethyl 4-Morpholino-3,3a,8,8a-tetrahydroazulene-5,6-dicarboxylates and Its 1-Substituted Derivatives

Shigeyasu Kuroda^*, Syuzi Hirooka, Mitsunori Oda, Hiroyuki Iwaki, Syuki Teranishi, Noriko Matsushita, Tamotsu Hongou, Mariko Ikeda, Syuichi Hayashi, Ryuta Miyatake, Mayumi Izawa, Masaki Yamada, Ichiro Shimao