Solvent-free and direct C(sp3)–H amination of adamantanes by grinding
摘要:
A facile, direct and environmentally benign conversion of C(sp(3))-H bonds to C(sp(3))-N bonds using substoichiometric amount of aprotic superelectrophiles polyhalomethane-AIX(3) has been achieved by grinding under solvent-free conditions at room temperature in air. It is a general and simple method for the direct amination of adamantanes, and a series of aminoadamantanes of azoles, arylamines or heteroarylamines were obtained in good to excellent yields. The advantages of this amination are atom economy, solvent-free, chemoselectivity, short reaction time and high yields. (C) 2014 Elsevier Ltd. All rights reserved.
Benzyne Click Chemistry: Synthesis of Benzotriazoles from Benzynes and Azides
作者:Feng Shi、Jesse P. Waldo、Yu Chen、Richard C. Larock
DOI:10.1021/ol800675u
日期:2008.6.1
A variety of substituted benzotriazoles have been prepared by the [3 + 2] cycloaddition of azides to benzynes. The reaction scope is quite general, affording a rapid and easy entry to substituted, functionalized benzotriazoles under mild conditions.
Synthesis of adamantane derivatives. LVIII. Reaction of 1-adamantyl chloride with some heterocyclic unsaturated silanes.
作者:TADASHI SASAKI、AKIRA NAKANISHI、MASATOMI OHNO
DOI:10.1248/cpb.30.2051
日期:——
Various silylated heterocycles having amide functionality were treated with 1-adamantyl chloride (1) in the presence of a Lewis acid to give the corresponding N-adamantylated heterocycles. If α-position to the reacting lactim nitrogen was substituted, the reaction no longer occurred, or the adamantylation occurred at the position other than the expected nitrogen. These facts are attributed to a steric blocking effect of the α-substituent. While the same treatment of the thioamide 46 gave the S-adamantylated product, 48 and 51 afforded in contrast the N- and S-adamantylated products, respectively ; this result can be explained in terms of steric effect. Analogously, silylated 2-pyrazolines and triazoles were adamantylated at nitrogen. The reactions of 2-trimethylsilylthiophene, furan and -pyridine with 1 failed to give site-selective monoadamantylation.
Gonzalez; Alarcon; Cabildo, European Journal of Medicinal Chemistry, 1985, vol. 20, # 4, p. 359 - 362
作者:Gonzalez、Alarcon、Cabildo、et al.
DOI:——
日期:——
——
作者:V. G. Tsypin、M. S. Pevzner、E. L. Golod
DOI:10.1023/a:1013938527863
日期:——
A procedure has been developed for oxidative N-adamantylation of azoles with 1-iodoadamantane in the presence of chromium(IV) oxide or iodine(V) oxide. The procedure is applicable to azoles whose pK(BH+) value does not exceed 2.26.
GONZALEZ, M. E.;ALARCON, B.;CABILDO, P.;CLARAMUNT, R. M.;SANZ, D.;ELGUERO+, EUR. J. MED. CHEM., 1985, 20, N 4, 359-362
作者:GONZALEZ, M. E.、ALARCON, B.、CABILDO, P.、CLARAMUNT, R. M.、SANZ, D.、ELGUERO+