26189-59-3Relevant academic research and scientific papers
A mild method for the replacement of a hydroxyl group by halogen: 3. the dichotomous behavior of α-haloenamines towards allylic and propargylic alcohols
Munyemana, Fran?ois,Patiny, Luc,Ghosez, Léon
, (2021/06/07)
A study of the deoxyhalogenation of allylic and propargylic alcohols with tetramethyl-α-halo-enamines is reported. Primary allylic and primary and secondary propargylic alcohols gave the corresponding halides in high yields. Secondary allylic and propargylic alcohols yielded the corresponding secondary halides but the reaction also produced some rearranged primary halides (I > Br > Cl). The reactions with tertiary allylic and tertiary propargylic alcohols gave several products and was therefore of little synthetic value. However, the addition of triethylamine to the reaction mixture or the use of lithium alkoxide instead of alcohol brought about a major change of the course of the reaction which led to amides carrying an allyl or an allenyl group at C2. This was shown to result from a Claisen-Eschenmoser rearrangement of an intermediate α-allyloxy- or propargyloxy-enamine.
A Practical synthesis of 3-Acyl cyclobutanones by [2 〈 2] annulation. Mechanism and utility of the zn(II)-Catalyzed condensation of r-Chloroenamines with electron-deficient alkenes
O'Brien, Jeannette M.,Kingsbury, Jason S.
, p. 1662 - 1672 (2011/05/12)
New conditions for the conversion of simple tertiary amides to R-chloroenamines and their use in Zn(II)-catalyzed cycloaddition reactions with commercial α,β-unsaturated carbonyl compounds allows rapid, regiocontrolled access to 3-acyl cyclobutanones. Rea
Alpha- haloenamine reagents
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, (2008/06/13)
The present invention describes immobilized haloenamine reagents, immobilized tertiary amides, methods for their preparation, and methods of use.
Aromatic and heteroaromatic acid halides for synthesizing polyamides
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, (2008/06/13)
The present invention is directed to protected amino acid halide monomers and oligomers, and to their use in the efficient sythesis of polyamides. The present invention is further directed to the use of α-haloenamine reagents, which may optionally be immobilized, for the preparation of the amino acid halides.
A general and practical method of synthesis of 2-disubstituted-1- chloro- and 1-bromoenamines
Ghosez, Leon,George-Koch, Isabelle,Patiny, Luc,Houtekie, Marc,Bovy, Philippe,Nshimyumukiza, Prosper,Phan, Thao
, p. 9207 - 9222 (2007/10/03)
Disubstituted-α-chloroenamines are useful synthetic intermediates which had earlier been prepared by the reaction of tertiary amides with phosgene. The toxicity of the latter led us to systematically investigate new synthetic routes towards α-chloro- and
Introduction of bromine and chlorine substituents in medium ring ethers and lactones
Bendall, Justin G.,Payne, Andrew N.,Screen, Thomas E. O.,Holmes, Andrew B.
, p. 1067 - 1068 (2007/10/03)
A convenient preparation of α-halo enamines using oxalyl halides is described together with applications of these reagents in the halogenation of β-hydroxy cyclic ethers and lactones.
