81676-05-3Relevant articles and documents
ZnI2/Zn(OTf)2-TsOH: A versatile combined-Acid system for catalytic intramolecular hydrofunctionalization and polyene cyclization
Chou, Ting-Hung,Yu, Bo-Hung,Chein, Rong-Jie
supporting information, p. 13522 - 13525 (2019/11/14)
A mild and efficient combined-Acid system using a zinc(ii) salt [ZnI2 or Zn(OTf)2] and p-Toluene sulfonic acid (TsOH) was investigated for catalytic cationic cyclizations, including intramolecular hydrocarboxylation, hydroalkoxylation, hydroamination, hydroamidation, hydroarylation and polyene cyclizations. This reaction provides easy access to five-and six-membered O-and N-containing saturated heterocyclic compounds, tetrahydronaphthalene derivatives and polycyclic skeletons in excellent yield with perfect Markovnikov selectivity and under mild conditions. The operational simplicity, broad applicability, and use of inexpensive commercially available catalysts make this protocol superior to existing methodologies.
Copper-Catalyzed Formal [2+2+1] Heteroannulation of Alkenes, Alkylnitriles, and Water: Method Development and Application to a Total Synthesis of (±)-Sacidumlignan D
Ha, Tu M.,Chatalova-Sazepin, Claire,Wang, Qian,Zhu, Jieping
supporting information, p. 9249 - 9252 (2016/08/05)
A copper-catalyzed three-component reaction of alkenes, alkylnitriles, and water affords γ-butyrolactones in good yields. The domino process involves an unprecedented hydroxy-cyanoalkylation of alkenes and subsequent lactonization with the creation of three chemical bonds and a quaternary carbon center. The synthetic potential of this novel [2+2+1] heteroannulation reaction was illustrated by a concise total synthesis of (±)-sacidumlignan D.
