o‐Carboryne (1,2‐dehydro‐o‐carborane) is a very useful synthon for the synthesis of a variety of carborane‐functionalized molecules. Diels‐Alder reaction of o‐carboryne with furans gave a series of carborane‐fused oxanorbornenes in moderate to high yields using 1‐OTf‐1,2‐C2B10H11 as carboryne precursor. The resultant cycloadducts can undergo hydrogenation, cyclic oxidation, bromination, [4 + 2]/[2
ø -Carboryne(1,2-脱氢ö -carborane)是用于多种碳硼烷官能化分子的合成一个非常有用的合成子。o - carboryne与呋喃的Diels-Alder反应使用1-OTf-1,2-C 2 B 10 H 11作为碳硼炔前体,以中等至高收率得到了一系列碳硼烷稠合的氧杂降冰片烯。生成的环加合物可以进行加氢,环氧化,溴化,[4 + 2] / [2 + 2]环加成和亲核开环反应,从而提供各种高度官能化的碳硼烷,这些化合物可能会在医学和材料科学中用作有用的基本单元。
Perfluororganotellur-verbindungen: die synthesen von C6F5TeTeC6F5, Hg(TeC6F5)2, CF3TeTeC6F5, CF3TeC6F5 und pentafluorphenylfuranen [1]
作者:Reiner Kasemann、Dieter Naumann
DOI:10.1016/s0022-1139(00)80433-9
日期:1990.6
the three new furan derivatives 2- and 3-pentafluorophenylfuran and 2,5-dihydro-2-pentafluorophenylfuran are prepared by irradiating a mixture of Te(C6F5)2 and furan. Te2(C6F5)2 reacts with elemental mercury to yield Hg(TeC6F5)2. From the reactions of Tex(CF3)2 with Tex(C6F5)2 (x = 1,2) equilibria are formed with the unsymmetrical compounds CF3TexC6F5. The syntheses, NMR, and mass spectra of these
通过辐射Te(C 6 F 5)的混合物来制备双(五氟苯基)二碲Te 2(C 6 F 5)2和三种新的呋喃衍生物2-和3-五氟苯基呋喃和2,5-二氢-2-五氟苯基呋喃。2,呋喃。Te 2(C 6 F 5)2与元素汞反应生成Hg(TeC 6 F 5)2。根据Te x(CF 3)2与Te x(C 6 F 5)的反应用不对称化合物CF 3 Te x C 6 F 5形成2(x = 1,2)平衡。描述了这些新化合物的合成,NMR和质谱。
Manganese(III) acetate-mediated oxidative coupling of phenylhydrazines with furan and thiophene: a novel method for hetero biaryl coupling
作者:Ayhan S. Demir、Ömer Reis、Mustafa Emrullahoğlu
DOI:10.1016/s0040-4020(02)01001-3
日期:2002.9
A convenient new method for the arylation of furan and thiophene with arylhydrazine and manganese(III) acetate is described. Oxidation of arylhydrazines with Mn(III) acetate in furan or thiophene affords the corresponding 2-aryl-substituted furans and thiophenes in good yield using commercially available materials; access to 2-substituted heterobiaryls works selectively, and coupling occurs with loss of the hydrazine moiety. (C) 2002 Elsevier Science Ltd. All rights reserved.