作者:Alan Katritzky、Anatoliy Vakulenko、Jothilingam Sivapackiam、Bogdan Draghici、Reddy Damavarapu
DOI:10.1055/s-2008-1032187
日期:2008.3
nitration of the corresponding mononitro furans with fuming nitric acid, thiophenes with acetyl nitrate, and thiazoles with trifluoroacetyl nitrate, gave dinitro-substituted furans, thiophenes, and thiazoles. The nitrations of 2-alkylthiophenes with 3 and 5 molar equivalents of acetyl nitrate, generated in situ, are discussed. Reactions of the mononitro furans with fuming nitric acid gave 1,1,5,5-tetrasubstituted
相应的单硝基呋喃用发烟硝酸直接硝化,噻吩用乙酰硝酸酯直接硝化,噻唑用三氟乙酰硝酸酯直接硝化,得到二硝基取代的呋喃、噻吩和噻唑。讨论了原位生成的 2-烷基噻吩与 3 和 5 摩尔当量的乙酰硝酸酯的硝化反应。单硝基呋喃与发烟硝酸反应生成 1,1,5,5-四取代二氢呋喃作为副产物。用肼或其甲基或苯基衍生物处理 5-甲基-4-硝基异恶唑,然后用过氧化氢 (50%) 氧化相应的 4-氨基-5-硝基-1H-吡唑,得到 4,5-二硝基 -1H -吡唑。1-烷基-3,5-二硝基-1H-[1,2,4]三唑的安全一锅法合成是由双氰胺开发的。