Use of mixed Li/K metal TMP amide (LiNK chemistry) for the synthesis of [2.2]metacyclophanes
作者:Marco Blangetti、Patricia Fleming、Donal F O'Shea
DOI:10.3762/bjoc.7.145
日期:——
A new two-step general approach to [2.2]metacyclophane synthesis from substituted m-xylenes is described. The strategy employs a selective benzylic metalation and oxidative C-C bond formation for both synthetic operations. Regioselective benzylic metalation is achieved using the BuLi, KOt-Bu, TMP(H) (2,2,6,6-tetramethylpiperidine) combination (LiNK metalation conditions) and oxidative coupling with
描述了一种从取代的间二甲苯合成 [2.2] 环芳烃的新的两步通用方法。该策略对两种合成操作均采用选择性苄基金属化和氧化 CC 键形成。使用 BuLi、KOt-Bu、TMP(H)(2,2,6,6-四甲基哌啶)组合(LiNK 金属化条件)和与 1,2-二溴乙烷的氧化偶联实现区域选择性苄基金属化。这种方法的合成简便性与之前报道的方法相比具有优势,并且可以轻松获得潜在有用的平面手性衍生物。
Medium-sized cyclophanes. Part XVI. Substitution versus transannular reaction of [2.2]metacyclophanes with benzoyl peroxide and cupric chloride. Importance of a cation radical intermediate in the transannular dehydrogenation
作者:Kozaburo Nishiyama、Kazuo Hata、Takeo Sato
DOI:10.1039/p29740000577
日期:——
treated with benzoyl peroxide (BPO) and cupric chloride in acetonitrile; one is nuclear substitution giving the 4-benzoate and the 8-cyanomethyl derivatives, each formed by a radical attack via a cyclohexadienyl intermediate, and the other is transannular dehydrogenation to give pyrene and hydropyrenes. The latter reaction occurs with BPO alone or with other metal halides. Transannular dehydrogenation is
Complexation of cyclophanes with the (η5-cyclopentadienyl)iron+ moiety
作者:Ali R. Koray
DOI:10.1016/s0022-328x(00)89215-3
日期:1982.7
The syntheses of the title compounds by the AlCl3-catalyzed ligand exchange reaction between ferrocene and 5,13-dimethyl[2.2]metacyclophane are reported. The species have been characterized by elemental analysis and 1H- and 13C-NMR spectroscopy.
Novel Annulene Dications from Methylated [2.2]Metacyclophane Monoenes and [<i>e</i>]-Ring Benzannelated Dimethyldihydropyrene
作者:Kenneth K. Laali、Takao Okazaki、Reginald H. Mitchell、Timothy R. Ward
DOI:10.1021/jo0100594
日期:2001.8.1
Tetramethyl- and hexamethyl-substituted [2.2]metacyclophane monoenes (10 and 11) are transformed into their corresponding trans-dimethyldihydroethanophenanthrenium dications (14(2+) and 15(2+)) in FSO(3)H x SbF(5) (4:1) and FSO(3)H x SbF(5) (1:1) with SO(2)ClF or SO(2) as the solvent; these 10 pi-dications are equivalent to the C-4/C-5 diprotonated dications of the 2,7-dimethyl derivative of trans-DMDHP
在FSO(3)H x SbF(5)()中将四甲基和六甲基取代的[2.2]甲基环环烷单烯(10和11)转换为它们相应的反式-二甲基二氢乙撑菲鎓盐(14(2+)和15(2+))( 4:1)和FSO(3)H x SbF(5)(1:1),以SO(2)ClF或SO(2)作为溶剂;这10种pi药物相当于反式DMDHP 3a的2,7-二甲基衍生物的C-4 / C-5双质子化药物。反式12c,12d-二甲基-12c,12d-二氢苯并[e] py(6)在令人惊讶的温和条件下与FSO(3)H / SO(2)ClF反应,最初产生持久的双质子化指示(6H(2) (2+))和随后的氧化指示(6(2+)); 低温1周后6(2 +):6H(2)(2+)比例达到4:1。还检测了抗元环烷(13)的质子化。
Syn-5,13-dimethyl[2.2]metacyclophane. Synthesis, spectra and thermal stability
作者:Yutaka Fujise、Yoshisuke Nakasato、Sho Itô
DOI:10.1016/s0040-4039(00)84677-8
日期:1986.1
The title compound was synthesized in 3 steps from trithia[23](1,3,5)cyclophane. Activation parameters for its change to the anti conformer as well as its NMR, IR and UV spectra were secured.