3419-66-7Relevant articles and documents
Enantioselective Hydroazidation of Trisubstituted Non-Activated Alkenes
Meyer, Daniel,Renaud, Philippe
supporting information, p. 10858 - 10861 (2017/08/30)
A one-pot procedure for the enantioselective hydroazidation of non-activated trisubstituted alkenes is described. Hydroboration with monoisopinocampheylborane (IpcBH2) provides dialkylboranes that are in situ selectively converted into monoalkyl-substituted catecholboranes; these undergo radical azidation upon treatment with benzenesulfonyl azide and a radical initiator. Enantiomerically enriched azides were thus obtained in yields of 59–81 % and enantioselectivities of up to 94:6 e.r. (98:2 e.r. if the intermediate dialkylborane is purified by crystallization). A rapid access to enantiomerically pure (+)-rodocaine is also described. The use of other arenesulfonyl radical traps enables enantioselective hydroallylation, hydrosulfanylation, and hydrobromination reactions with yields of 71–86 %.
An efficient method for chlorination of alcohols using PPh3/Cl3CCONH2
Pluempanupat, Wanchai,Chavasiri, Warinthorn
, p. 6821 - 6823 (2007/10/03)
A new and convenient method for the chlorination of alcohols utilizing PPh3/Cl3CCONH2 is addressed. Various alcohols could smoothly be converted into their corresponding alkyl chlorides in high yield under mild conditions with short reaction times. A mechanism is disclosed with the evidence of inversion of configuration of the analogous alkyl chloride derived from R-(-)-2-octanol.
Stereospecific Substituted Alkene Synthesis by Organo Lithium Reductive Alkylation of Epoxides
Doris, Eric,Dechoux, Luc,Mioskowski, Charles
, p. 7943 - 7946 (2007/10/02)
Stereospecifically alkylated olefins were synthesized in good yields by reaction of various epoxides with organolithium reagents with concommitant introduction of the alkyl group.