Molecularclip 1 remains monomeric in water and engages in host–guest recognition processes with suitable guests. We report the Ka values for 32 1⋅guest complexes measured by 1H NMR, UV/Vis, and fluorescence titrations. The cavity of 1 is shaped by aromatic surfaces of negative electrostatic potential and therefore displays high affinity and selectivity for planar and cationic aromatic guests that
分子夹1在水中仍然是单体,并与合适的客人一起参与宿主-客体识别过程。我们报告了通过1 H NMR,UV / Vis和荧光滴定法测得的32个1⋅客体配合物的K a值。1的腔体由负电势的芳族表面形成,因此对平面和阳离子芳族客体显示出高亲和力和选择性,这使其与CB [ n ]受体相区别,后者比脂族客体更喜欢脂肪族。静电作用在识别过程中起着主要作用,在此过程中,铵离子和C = O的1个基团之间可能发生离子-偶极相互作用。情况下,SO之间3 -基团的1和在来宾悬垂阳离子基团,和空腔内1由阳离子-π相互作用。宿主1对具有大的平面芳族表面(例如萘二酰亚胺NDI +和per二酰亚胺PDI +)和衍生自a啶的阳离子染料(例如亚甲基蓝和天蓝色A)表现出较高的亲和力。通过比较类似的中性和阳离子客体(例如,亚甲基紫与亚甲基蓝;喹啉与N-甲基喹啉鎓; a啶与N-甲基ac啶;中性红与中性红H +)可以确定阳离子-π相
Efficient Reduction of 2-Haloacetophenone Derivatives to the Corresponding Halohydrins by 9,10-Dihydro-10-methylacridine in the Presence of Titanium Tetrachloride, Comparison with the Reduction in the Presence of Perchloric Acid
derivatives are reduced by an acid-stable NADH model compound, 9,10-dihydro-10-methylacridine, in the presence of HClO4 in acetonitrile at 335 K to yield 10-methylacridinium ion and the parent acetophenone derivatives as well as halohydrins, while the reduction of 2-haloacetophenone derivatives in the presence of TiCl4 in dichloromethane undergoes much more readily even at 298 K to yield the corresponding
2-卤代苯乙酮衍生物被酸稳定的 NADH 模型化合物 9,10-二氢-10-甲基吖啶还原,在 HClO4 存在下,在 335 K 的乙腈中生成 10-甲基吖啶离子和母体苯乙酮衍生物以及卤代醇,而在二氯甲烷中 TiCl4 存在下 2-卤代苯乙酮衍生物的还原即使在 298 K 下也更容易发生,以选择性地产生相应的卤代醇。
Selective photoalkylation of 10-methylacridinium ion with tetra-alkylstannanes or diethylmercury using visible irradiation
作者:Shunichi Fukuzumi、Sadaki Kuroda、Toshio Tanaka
DOI:10.1039/c39860001553
日期:——
Efficient and selectivephotoalkylation of 10-methylacridiniumion with tetra-alkyltin compounds and diethylmercury is initiated by electron transfer from the alkylmetals to the singlet excited state of 10-methylacridiniumion in acetonitrile under irradiation with visible light.
Generation and direct observation of the thioxanthenyl and N-methyl acridinyl anions; A family of stable, paratropic, “4N” π-excessives
作者:A.G. Anastassiou、H.S. Kasmai、M.R. Saadein
DOI:10.1016/0040-4039(80)80167-5
日期:1980.1
The title, thermally stable, heterocarbanions (2a, 2b) were generated upon respective exposure of conjugate acids 4(a,b) to a KNH2/liq. NH3 system and were shown (NMR) to possess (2a more than 2b) distinct elements of paratropicity.
Photoinduced hydride reduction of 10-methylacridinium ion (AcrH+) by alkylbenzene occurs to yield 10-methyl-9,10-dihydroacridine in the presence of perchloricacid, while photoaddition occurs to yield 9-alkyl-10-methyl-9,10-dihydroacridine in the absence of perchloricacid. The hydride reduction of AcrH+ in the presence of perchloricacid proceeds via protonation of acridinyl radical produced by photoinduced