30390-50-2Relevant articles and documents
A Simple, Mild and General Oxidation of Alcohols to Aldehydes or Ketones by SO2F2/K2CO3 Using DMSO as Solvent and Oxidant
Zha, Gao-Feng,Fang, Wan-Yin,Leng, Jing,Qin, Hua-Li
supporting information, p. 2262 - 2267 (2019/04/17)
A practical, general and mild oxidation of primary and secondary alcohols to carbonyl compounds proceeds in yields of up to 99% using SO2F2 as electrophile in DMSO as both the oxidant and the solvent at ambient temperature. No moisture- and oxygen-free conditions are required. Stoichiometric amount of inexpensive K2CO3, which generates easy to separate by-products, is used as the base. Thus, 5-gram scale runs proceeded in nearly quantitative yields by a simple filtration as the work-up. The use of a polar solvent such as DMSO, which usually promotes competing Pummerer rearrangement, is also noteworthy. This protocol is compatible with a variety of common N-, O-, and S-functional groups on (hetero)arene, alkene and alkyne substrates (68 examples). The protocol was applied (99% yield) to a formal synthesis of the important cholesterol-lowering drug Rosuvastatin. (Figure presented.).
Synthesis of (4: E,6 Z,10 Z)-hexadeca-4,6,10-trien-1-ol and (4 E,6 E,10 Z)-hexadeca-4,6,10-trien-1-ol, the pheromone components of cocoa pod borer moth Conopomorpha cramerella
Huang, Fei,Zhang, Yushun,Yao, Yun,Yang, Wanqiu,Tao, Yunhai
, p. 35575 - 35580 (2017/07/28)
A concise and efficient synthesis of the pheromone components of the cocoa pod borer moth, namely (4E,6Z,10Z)-hexadeca-4,6,10-trien-1-ol and (4E,6E,10Z)-hexadeca-4,6,10-trien-1-ol, starting from commercially available materials, was reported. The overall yield was 30.4% and 27.4%, respectively. The stereoselective formation of (E,Z)- or (E,E)-conjugated double bond relied on Sonogashira coupling with (E)-5-bromopent-4-en-1-ol prepared from (E)-5-bromopent-4-enal and the stereoselective hydrogenation of the enyne, while the 10Z-double bond was formed by Wittig reaction from 4-hydroxybutanal and n-hexyltriphenylphosphonium bromide.
Total synthesis of (8S,11R,12R)- and (8R,11R,12R)-topsentolide B 2 diastereomers and assignment of the absolute configuration
Fernandes, Rodney A.,Kattanguru, Pullaiah
experimental part, p. 1930 - 1935 (2012/01/13)
An improved total synthesis of (8S,11R,12R)- and (8R,11R,12R)-topsentolide B2 diastereomers has been completed in eight steps with overall yields of 10.2% and 10.4%, respectively. The key steps involve a regioselective asymmetric dihydroxylation, diastereoselective Roush allylation, and ring closing metathesis. The stereochemistry of natural topsentolide B2 has been determined to be (8S,11R,12R) by comparison of the specific rotation.
