122617-24-7Relevant articles and documents
Highly Heteroatom-dependent ?-Facial Stereoselectivity in the Diels-Alder Reaction of 1,3-Cyclopentadienes Having a Heteroatom Substituent at 5-Position
Ishida, Masaru,Aoyama, Takamichi,Kato, Shinzi
, p. 663 - 666 (1989)
5-Phenylthio-1,3-cyclopentadiene reacted with maleic anhydride to give a 4:6 mixture of syn- and anti-attack adducts.In contrast, the selenium isologue, 5-phenylseleno-1,3-cyclopentadiene reacted with dienophiles with remarkable anti-?-facial selectivity