1033366-39-0Relevant articles and documents
Dramatic base-oriented chemoselective tandem wacker cyclizations: Synthesis of bisbenzannelated spiroketals and 2-substituted chromans
Xin, Zhijun,Zhang, Yuan,Tao, Hua,Xue, Jijun,Li, Ying
, p. 1579 - 1584 (2011/08/06)
A Pd(II)/Cu(II)-catalyzed chemoselective tandem aerobic cyclization of phenolic olefins leads to [5,6]-bisbenzannelated spiroketals or 2-substituted chromans, wherein it was interestingly found that the presence or absence of base could be responsible for the tunable selectivity. The [5,6]- bisbenzannelated spiroketals were achieved from tandem Wacker cyclization-aroxylation in moderate yields in the absence of base, and 2-substituted chromans were formed through base-mediated Pd(II)/Cu(II)-catalyzed tandem Wacker cyclization-Michael addition in good yields. Georg Thieme Verlag Stuttgart ? New York.
Gold-catalyzed double intramolecular alkyne hydroalkoxylation: Synthesis of the bisbenzannelated spiroketal core of rubromycins
Zhang, Yuan,Xue, Jijun,Xin, Zhijun,Xie, Zhixiang,Li, Ying
, p. 940 - 944 (2008/12/22)
The synthesis of the bisbenzannelated spiroketal core of natural bioactive rubromycins via a gold-catalyzed double intramolecular hydroalkoxylation was described. A comparative study on the formation of aliphatic and of aromatic spiroketals was also condu