Photocycloaddition chemistry of 2-(trimethylsilyl)cyclopentenone and 5-(trimethylsilyl)uracil. The utility of a trimethylsilyl group as a removable directing group in photochemistry
在THF中用2 C 8 K还原MnBr 2 · n LiBr(n = 1,2),得到高活性的Mn-石墨,它容易插入烯丙基-,烯基-,(取代的)芳基-和杂芳基卤化物中。如此获得的官能化的有机锰化合物可以有效地被不同的亲电子试剂(例如醛,酸酐和酰氯)捕获,或者可以在催化量的Fe(acac)3存在下与链烯基卤化物交联。
4-dibenzyloxy-5-lithiopyrimidines, obtained from the corresponding substituted 5-bromopyrimidines, react with trimethylsilylchloride or trimethylstannyl chloride to give the appropriate 5-trimethylsilyl or 5-trimethylstannyl derivatives. The following compounds were synthesized by this reaction sequence: 2,4-dimethoxy-5-trimethylsilylpyrimidine (2), 2,4-dibenzyloxy-5-trimethylsilylpyrimidine (3), 2,
Functionalization of Unprotected Uracil Derivatives Using the Halogen−Magnesium Exchange
作者:Felix Kopp、Paul Knochel
DOI:10.1021/ol063136w
日期:2007.4.1
The reaction of commercially available 5-iodouracil with 2 equiv of MeMgCl in the presence of LiCl, followed by the addition of i-PrMgCl center dot LiCl, provides the corresponding trimagnesiated species, which reacts with various electrophiles to give selectively 5-functionalized uracil derivatives. This method was also successfully applied to the functionalization of 6-iodouracils including the synthesis of pharmaceutically relevant Emivirine and HEPT precursors.
Synthesis, antitumorigenic activity, and electrochemical properties of uracil derivatives of the furan series
作者:M. Trushule、�. Kupche、I. Augustane、N. V. Verovskii、�. Lukevits、L. Baumane、R. Gavar、Ya. Stradyn'
DOI:10.1007/bf00515582
日期:1991.12
Anion-mediated fragmentation reactions. Mechanistic and synthetic aspects of the fragmentation and rearrangement reactions of pyrimidinedione-alkyne photoadducts
作者:Victor V. Kaminski、Robert N. Comber、Allan J. Wexler、John S. Swenton
DOI:10.1021/jo00162a008
日期:1983.7
SHIH C.; FRITZEN E. L.; SWENTON J. S., J. ORG. CHEM., 1980, 45, NO 22, 4462-4471