翻訳と辞書 Words near each other ・ 40,000 Headmen ・ 4-nitrophenylphosphatase ・ 4-Nitropyridine-N-oxide ・ 4-Nitroquinoline 1-oxide ・ 4-Nitrotoluene ・ 4-Nonanoylmorpholine ・ 4-Nonylphenylboronic acid ・ 4-O-beta-D-mannosyl-D-glucose phosphorylase ・ 4-O-Methylhonokiol ・ 4-oxalmesaconate hydratase ・ 4-oxalocrotonate decarboxylase ・ 4-Oxalocrotonate tautomerase ・ 4-oxalomesaconate tautomerase ・ 4-Oxo-2-nonenal ・ 4-oxoproline reductase ・ 4-Phenyl-1,2,4-triazole-3,5-dione ・ 4-Phenyl-4-(1-piperidinyl)cyclohexanol ・ 4-Phenylazepane ・ 4-Phenylfentanyl ・ 4-Phenylpiperidine ・ 4-Phenylthiosemicarbazide ・ 4-phosphoerythronate dehydrogenase ・ 4-phosphopantoate—beta-alanine ligase ・ 4-phytase ・ 4-Piperidinone ・ 4-Player Bowling Alley ・ 4-polytope ・ 4-poster ・ 4-PPBP ・ 4-pyridoxolactonase Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 4-Phenyl-1,2,4-triazole-3,5-dione ： ウィキペディア英語版 4-Phenyl-1,2,4-triazole-3,5-dione |Section2= |Section7= |Section8= }} 4-Phenyl-1,2,4-triazoline-3,5-dione (PTAD) is an azodicarbonyl compound. PTAD is one of the strongest dienophiles and reacts rapidly with dienes in Diels-Alder reactions. The most prominent use of PTAD was the first successful synthesis of prismane in 1973. ==Synthesis== The compound was first synthesized in 1894 by Johannes Thiele and O. Stange. The oxidation of 4-Phenylurazol with lead tetroxide in sulfuric acid yielded small quantities of the substance. It took until 1971 when a practical synthesis was published. The synthesis starts from hydrazine and diethyl carbonate. The product of this step is reacted with phenyl isocyanate and subsequently transformed to the 4-Phenylurazol. Cyclization and subsequent oxidation yields PTAD (6). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「4-Phenyl-1,2,4-triazole-3,5-dione」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.