Synthesis, Structure, and Some Reactions of (2,4,6-Tri-<i>t</i>-butyl)thiobenzaldehyde, the First Stable Aromatic Thioaldehyde
作者:Akihiko Ishii、Takashi Ishida、Naoko Kumon、Nobuo Fukuda、Hiroyuki Oyama、Naoki Inamoto、Fujiko Iwasaki、Renji Okazaki
DOI:10.1246/bcsj.69.709
日期:1996.3
6-tri-t-butylphenyllithium with O-ethyl thioformate or that of 2,4,6-tri-t-butylbenzaldehyde hydrazone with disulfur dichloride in the presence of triethylamine. The thioaldehyde 1 is a purple crystalline compound which is thermally quite stable; only around 200 °C it underwent intramolecular cyclization to give 6,8-di-t-butyl-3,4-dihydro-4,4-dimethyl-1H-2-benzothiopyran 9. The X-ray crystallographic analysis
在三乙胺存在下,通过2,4,6-三叔丁基苯基锂与硫代甲酸O-乙酯或2,4,6-三叔丁基苯甲醛腙与二氯化二硫反应合成标题化合物1。硫代醛 1 是一种紫色结晶化合物,热稳定;仅在 200 °C 左右进行分子内环化,得到 6,8-二叔丁基-3,4-二氢-4,4-二甲基-1H-2-苯并噻喃 9。 1 的 X 射线晶体分析表明,硫甲酰基几乎垂直于芳环。1与1-氰基-1-甲基乙基自由基反应得到9,而与叔丁基反应得到1,3,5-三-叔丁基-2-叔丁基硫代甲基苯和叔丁基2,2-二甲基-1-(1,3,5-三叔丁基双环[2.2.0]六-2,5-二烯-2-基)丙基硫醚除了9。一些格氏试剂和有机锂与 1 反应产生亲碳、亲硫、双加成产物和其他一些取决于有机金属试剂的种类。肼和丁基...