Application of t-2-benzoyl-t-5-phenylcyclohexane-r-1-carboxylic acid for the preparation of saturated isoindole-fused heterocyclesDedicated to Professor András Messmer on the occasion of his 80th birthday.
作者:Géza Stájer、Angela E. Szabó、Ferenc Csende、Gyula Argay、Pál Sohár
DOI:10.1039/b107293p
日期:2002.2.25
t-2-Benzoyl-t-5-phenylcyclohexane-r-1-carboxylic acid 1 reacts with cis-2-aminocyclohexanemethanol to give the saturated cis-isoindolo[2,1-a][3,1]benzoxazine 2. Reaction of 1 with trans-2-aminocyclohex-4-enemethanol yields three diastereomeric isoindolo derivatives 3a–c. Cyclization of 1 with 1,3-diaminopropane results in a diastereomeric mixture of cis-pyrimido[1,2-a]isoindolones 4a,b. With di-endo-norbornane aminoalcohol, 1 reacts to yield a mixture of cis- and trans-annelated diastereomers 5 and 6. In its reactions with di-exo-norbornane and norbornene aminoalcohols, 1 isomerizes to give cis-condensed isoindolo derivatives 7–10. After isolation, the structures were established by 1H and 13C NMR spectroscopy, with up-to-date measuring techniques such as NOEDIF, DEPT, HMQC, 2D-NOESY, 2D-COSY and HMBC and, for 10, X-ray measurements. The results show that, with two exceptions, the trans acid 1 undergoes isomerization to give cis-condensed products.
t-2-苯甲酰-t-5-苯基环己烷-r-1-羧酸1与顺-2-氨基环己醇反应,生成饱和的顺-异吲哚并[2,1-a][3,1]苯并噁唑啉2。1与反-2-氨基环己-4-烯醇反应生成三个非对映异构体的异吲哚衍生物3a–c。1与1,3-二氨基丙烷环化反应生成一种非对映异构体混合物的顺-吡咯并[1,2-a]异吲哚酮4a,b。与二-内环诺烷氨醇反应,1生成顺-和反-环状非对映异构体的混合物5和6。在与二-外环诺烷和诺烯氨醇的反应中,1异构化生成顺-缩合异吲哚衍生物7–10。经过分离后,利用1H和13C NMR光谱法以及最新的测量技术如NOEDIF、DEPT、HMQC、2D-NOESY、2D-COSY和HMBC,以及对于10的X射线测量确定了结构。结果表明,除了两个例外,转酸1发生异构化,生成顺缩合产物。