17763-70-1Relevant articles and documents
Ni-Catalyzed Cross-Electrophile Coupling of Aryl Triflates with Thiocarbonates via C-O/C-O Bond Cleavage
Zhu, Zhaodong,Gong, Yuxin,Tong, Weiqi,Xue, Weichao,Gong, Hegui
supporting information, p. 2158 - 2163 (2021/04/05)
A nickel-catalyzed reductive coupling of aryl triflates with thiocarbonates is reported here. Both electron-rich and -deficient aryl C(sp2)-O electrophiles as well as a class of O-tBu S-alkyl thiocarbonates are compatible with the optimized reaction conditions, as evidenced by 49 examples. The reaction also proceeds with good chemoselective cleavage of the C-O bond with regard to thioesters. This work broadens the scope of nickel-catalyzed reductive cross-electrophile coupling reactions.
Introduction of Aryl Fluorosulfates into the Realm of Catellani Reaction Substrates
Bieliū Nas, Vidmantas,De Borggraeve, Wim M.
, p. 15706 - 15717 (2019/11/21)
Application of activated phenol fluorosulfates as substrates in a Pd/NBE mediated sequential alkylation-arylation, commonly known as a Catellani reaction, is presented. These substrates provide a level of complementarity to the commonly used aryl halides and, in combination with a plethora of existing Catellani reaction variations, enable even wider application of this powerful synthetic tool.
A synthetic camptothecin compound in 5-6 method of and ring structure (by machine translation)
-
Paragraph 0044; 0045, (2016/10/20)
The present invention discloses a synthetic camptothecin compound in the 5 [...] 6 method of and ring structure, the method is that the conjugated structure of formula II occurs in the solvent alkene alkyne ester series cyclization reaction in the molecule, thus the system results in the type shown in I of the 5 [...] 6 and ring structure, the specific equation is: In the formula: R 1 and R 2 are respectively and independently selected from hydrogen, alkyl, cycloalkyl, aryl or heterocyclic group; or, R 1 and R 2 together form a saturated or unsaturated carbocyclic or heterocyclic; R 3 and R 4 are respectively and independently selected from hydrogen, alkyl, cycloalkyl, aryl or heterocyclic group; or, R 3 and R 4 together form a saturated or unsaturated carbocyclic or heterocyclic rings; selected from R C 1-C 4 alkyl; P is amino protecting group. The stated method of this invention has the advantages of simple operation, safety and environmental protection, low production cost, high yield, is suitable for large-scale production, and the like, to promote such compounds in the medical field with the extensive application of an important value. (by machine translation)