已经研究了几种八乙基卟啉[分子式:见正文]-阳离子自由基的内 16 元环中交替键距离模式的可能外观和性质。这项研究是通过认识到一种意想不到的溶剂系统(即二氯甲烷/氯仿)而成为可能的,尽管 [分子式:见正文]-阳离子物质在氯仿中的溶解度极为有限。通过单晶 X 射线结构测定研究了总共六种 [M(OEP[Formula: see text]][Formula: see text] 衍生物。两种新的锌衍生物在数量上显示出与先前观察到的相同的交替模式。新的镍络合物显示出较小但现在可能很重要的交替模式。然而,铜衍生物,经过两次独立分析,没有显示出交替模式的证据。两个不同的镁衍生物显示了环-环相互作用对前两个轨道能量的重要性。具有强烈重叠环的衍生物显示出交替的键距离模式,而另一个具有适度重叠的环对的衍生物则没有。这表明强环-环相互作用在导致伪 Jahn-Teller 状态中的重要性;这一假设也得到了其他先前结果的支持。
and PhS− ions. Whereas 4a gave only SN2 products, 4b gave SN2 and E2C products typical of SN2/E2C competition. Among the salts 5a–c displacement of the benzylgroup was dominant (5a) or exclusive (5b, c), thus exhibiting the preferential displacement of a benzylgroup that has been fully documented in earlier studies of SN2 reactions. Qualitative comparison showed that 3a (methyl) reacted much faster
Synthesis of 2-(2-, 3-, and 4-pyridyl)benzoxazoles by the reaction of phenolic schiff bases with thianthrene cation radical
作者:Myeong Soon Park、Koon Ha Park、Kun Jun、Seung Rim Shin、Sea Wha Oh
DOI:10.1002/jhet.5570390625
日期:2002.11
2-(2-, 3-, and 4-Pyridyl)benzoxazole derivatives were prepared in excellent yields by the oxidative cyclization of phenolicSchiffbases with thianthrene cation radical perchlorate in the presence of 2,6-di-tert-butyl-4-methylpyridine.
Synthesis of 2-Styrylbenzoxazole Derivatives by the Reaction of Styrylphenolic Schiff Bases with Thianthrene Cation Radical
作者:Hee Jung Park、Myeong Soon Park、Tae Hee Lee、Koon Ha Park
DOI:10.1002/jhet.1707
日期:2013.5
method of 2‐styrylbenzoxazoles by oxidative intramolecular cyclization of styrylphenolic Schiff bases with thianthrenecation (Th+.ClO4−) is described. The oxidative cyclization of Schiff bases in the presence of 2,6‐di‐tert‐butyl‐4‐methylpyridine (DTBMP) gives 2‐styrylbenzoxazole derivatives in better yields than those in the absence of DTBMP.
Decomposition of Alkene Adducts of Thianthrene Cation Radical in Nitrile Solvents. Formation of Alkyl-2-oxazolines and a New Class of Four-Component Products: 5-[(1-Alkoxyalkylidene)ammonio]alkylthianthrenium Diperchlorates
作者:Henry J. Shine、Bing-Jun Zhao、John N. Marx、Teyeb Ould-Ely、Kenton H. Whitmire
DOI:10.1021/jo0402125
日期:2004.12.1
The monoadducts (4a−d) of thianthrene cationradicalperchlorate (1a) and isobutene, 2-methylbutene, 2-methyl-2-butene, and 2-methylpentene decompose spontaneously in acetonitrile (MeCN) solution, with the formation of thianthrene (Th). Decomposition of 4a (1,2-(5,10-thianthreniumdiyl)-2-methylpropane diperchlorate) and 4a‘, the corresponding dihexafluorophosphate, was studied in depth and extensively
Reaction of thianthrene cation radical with grignard reagents
作者:Miroslaw Soroka、Henry J. Shine
DOI:10.1016/s0040-4020(01)88071-6
日期:1986.1
tetrahydrofuran (THF). In ether solution reactions R = Bu, s-Bu, t-Bu, 5-hexenyl, and cyclopentylmethyl. Major products were the alkane, the alkene R(-H) in some cases, and, in the cases of R = Bu, 5-hexenyl, and cyclopentylmethyl, the 5-alkylthianthrenium perchlorate (ThR+ClO-4). When 5-hexenylMgCl was used a mixture of 5-(5-hexenyl)- and 5-(cyclopentylmethyl)thianthrenium per-chlorates in the ratio