10035-86-6Relevant academic research and scientific papers
GENERATION OF AN ACTIVE ACYL SPECIES FROM STABLE 1-METHYL-2-ACYL-1H-IMIDAZOLES
Ohta, Shunsaku,Hayakawa, Satoshi,Okamoto, Masao
, p. 5681 - 5684 (1984)
1-Methyl-2-(1'-cyano-1'-trimethylsilyloxy)alkyl-1H-imidazoles (2) were easily prepared from the corresponding stable carbonyl compounds, 1-methyl-2-acyl-1H-imidazoles (1).When the quarternary salts of 2 were treated with various nucleophiles, reactive acyl species, which was presumed to be acylcyanide (12), was generated in situ under C-C bond fission to result in producing the corresponding acylated compounds (5-10) in good yields.
Conjugate reduction and reductive aldol cyclization of α,β- unsaturated thioesters catalyzed by (BDP)CuH
Li, Ninglin,Ou, Jun,Miesch, Michel,Chiu, Pauline
supporting information; experimental part, p. 6143 - 6147 (2011/10/08)
A conjugate reduction of α,β-unsaturated thioesters catalyzed by copper hydride using PMHS as stoichiometric reductant has been developed. 1,2-Bis(diphenylphosphino)benzene (BDP) was the most effective ligand for this reduction. Saturated thioesters could be produced in excellent yields when the substituent on the thiol is not sterically-demanding. This protocol was applied to induce the reductive aldol cyclization of keto-enethioates, which could offer β-hydroxythioesters in moderate to good yields.
THIOL ESTER IN ORGANIC SYNTHESIS XV. REDUCTION WITH TETRABUTYLAMMONIUM BOROHYDRIDE
Liu, Hsing-Jang,Luo, Weide
, p. 387 - 392 (2007/10/02)
Treatment of thiol ester with tetrabutylammmonium borohydride in refluxing chloroform gave rise to the corresponding alcohols.
Synthesis and Application of Imidazole Derivatives. Synthesis and Acyl Activation of 2-Acyl-1-methyl-1H-imidazoles
Ohta, Shunsaku,Hayakawa, Satoshi,Moriwaki, Hiroki,Harada, Suzumi,Okamoto, Masao
, p. 4916 - 4926 (2007/10/02)
2-Acyl-1-methyl-1H-imidazoles (3) were prepared in good yields by treating 1-acylpyrrolidines (5) with 2-lithio-1-methyl-1H-imidazole (2) at -78 deg C.The acyl group of 3 was very stable under various severe conditions, but 2-benzoylimidazole (3a) was gradually hydrolyzed by heating with 1.3 N NaOH to produce benzoic acid and 1-methyl-1H-imidazole.Acyl activation of 3 was performed by direct quaternization of 3 with iodomethane or dimethyl sulfate or more successfully by quaternization of the corresponding O-trimethylsilylated gem-cyanohydrin (11) with dimethyl sulfate.Keywords- acylimidazole; 2-acylimidazole; imidazolium salt; acyl group activation; acylation; C-C bond fission; protecting group; latent functionality
