Simple, efficient total synthesis of cantharidin via a high-pressure Diels-Alder reaction

1980 ◽  
Vol 102 (22) ◽  
pp. 6893-6894 ◽  
Author(s):  
William G. Dauben ◽  
Carl R. Kessel ◽  
Kazuo H. Takemura
1993 ◽  
Vol 41 (12) ◽  
pp. 2087-2095 ◽  
Author(s):  
Yoshisuke TSUDA ◽  
Shinzo HOSOI ◽  
Nobuya KATAGIRI ◽  
Chikara KANEKO ◽  
Takehiro SANO

Heterocycles ◽  
1992 ◽  
Vol 33 (2) ◽  
pp. 497 ◽  
Author(s):  
Yoshisuke Tsuda ◽  
Shinzo Hosoi ◽  
Nobuya Katagiri ◽  
Chikara Kaneko ◽  
Takehiro Sano

2015 ◽  
Vol 11 ◽  
pp. 576-582 ◽  
Author(s):  
Grzegorz Mlostoń ◽  
Paulina Grzelak ◽  
Maciej Mikina ◽  
Anthony Linden ◽  
Heinz Heimgartner

Selected hetaryl and aryl thioketones react with acetylenecarboxylates under thermal conditions in the presence of LiClO4 or, alternatively, under high-pressure conditions (5 kbar) at room temperature yielding thiopyran derivatives. The hetero-Diels–Alder reaction occurs in a chemo- and regioselective manner. The initially formed [4 + 2] cycloadducts rearrange via a 1,3-hydrogen shift sequence to give the final products. The latter were smoothly oxidized by treatment with mCPBA to the corresponding sulfones.


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