2004-67-3Relevant articles and documents
Synthesis of antimalarial trioxanes via continuous photo-oxidation with 1O2 in supercritical CO2
Hall, Jessica F. B.,Bourne, Richard A.,Han, Xue,Earley, James H.,Poliakoff, Martyn,George, Michael W.
, p. 177 - 180 (2013)
The oxidation of an allylic alcohol to its hydroperoxides represents a key step in the synthesis of a series of spirobicyclic, antimalarial trioxanes. Herein, we investigate the continuous photo-oxidation of an allylic alcohol with 1O2 in scCO2, as a 'green' alternative to conventional methods, and examine the remaining two steps in the synthesis of antimalarial trioxanes from readily available starting materials.
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Tidd,B.K.
, p. 1168 - 1176 (1971)
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A process for preparing 2 - methyl - 1, 3 - pentadiene method (by machine translation)
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Paragraph 0018-0020; 0024-0026; 0030-0032, (2019/06/30)
A process for preparing 2 - methyl - 1, 3 - pentadiene method, relates to 2 - methyl - 1, 3 - pentadiene. The 2 - methyl - 2, 4 pentanediol remove one molecule of water, to obtain the 4 - methyl - 4 - pentene - 2 - ol; the 4 - methyl - 4 - pentene - 2 - ol to remove a water molecule, to obtain 2 - methyl - 1, 3 - pentadiene. The 2 - methyl - 1, 3 - pentadiene yield, 2 - methyl - 1, 3 - pentadiene and 4 - methyl - 1, 3 pentadiene ratio can be increased to 9:1, 2 - methyl - 1, 3 - pentadiene and production yield is greater than 80%. The use of weakly acidic catalyst, to reduce the loss of the device. Selecting mild catalyst, to reduce the loss of the device, improves the reaction environment-friendly. The method of dewatering step by step, the reaction greatly reduces the 4 - methyl - 1, 3 pentadiene generation, improves the 2 - methyl - 1, 3 pentadiene yield. (by machine translation)
Highly diastereoselective hydrostannylation of allyl and homoallyl alcohols with dibutyl(trifluoromethanesulfoxy)stannane
Miura, Katsukiyo,Wang, Di,Hosomi, Akira
, p. 9366 - 9367 (2007/10/03)
Dibutyl(trifluoromethanesulfoxy)stannane (Bu2Sn(OTf)H, 1a) was found to be very valuable for highly diastereoselective homolytic hydrostannylation of allyl and homoallyl alcohols. α,β-Disubstituted allyl alcohols and α,γ-disubstituted homoallyl alcohols were converted into γ- and δ-stannylated alcohols with high 1,2-syn and 1,3-syn diastereoselectivity, respectively. The origin of the stereochemical outcomes can be rationalized by conformational fixation of the intermediary β-stannylalkyl radical by coordination of the hydroxy group to the Lewis acidic tin center. Copyright