新型N-取代-R-氧基羰基-1,6-亚甲基桥[10]轮烯-3,4-二甲酰亚胺的无溶剂合成

在无溶剂条件下,1,6-亚甲基桥[10]轮烯-3,4-二甲酸酐与尿素反应制得1,6-亚甲基桥[10]轮烯-3,4-二甲酰亚胺(2);2与KOH的甲醇溶液于常温反应得1,6-亚甲基桥[10]轮烯-3,4-二甲酰亚胺钾(3);3与氯甲酸酯反应合成了4个新型的N-酯基取代的1,6-亚甲基桥[10]轮烯-3,4-二甲酰亚胺,其结构经1H NMR,13C NMR,IR,MS和HR-MS表征。     

新型N-氨基取代的1,6-亚甲基桥[10]轮烯-3,4-二甲酰亚胺的无溶剂合成

以1,6-亚甲基桥[10]轮烯-3,4-二乙酯为原料,简便地合成了二甲酸酐(2);2与肼在氮气保护下,无溶剂于170 ℃反应30 min,以较高收率合成了4个新型N-氨基取代的1,6-亚甲基桥[10]轮烯-3,4-二甲酰亚胺,其结构经1H NMR, 13C NMR, MS及HR-MS表征.     

N-羟基-1,6-亚甲基桥[10]轮烯-3,4-酰亚胺/乙酸钴液相催化氧化3-甲基吡啶制备烟酸

以1,6-亚甲基桥[10]轮烯-3,4-二甲酸酐为原料,与羟胺基盐酸盐经酰化和脱水反应制得N-羟基-1,6-亚甲基桥[10]轮烯-3,4-酰亚胺(2);构建了2/乙酸钴催化体系,以氧分子为氧源,乙腈为溶剂,在1 MPa氧气压力下于120℃反应20 h,氧化3-甲基吡啶制备烟酸,产率70%,其结构经~1H NMR和IR确证。     

简便合成3,3'-联-1,6-亚甲基桥[10]轮烯

以1,6-二甲酰基环庚三烯为原料通过10π电子环化反应等3步反应制备了3-溴代-1,6-亚甲基桥[10]轮烯, 通过3-溴代-1,6-亚甲基桥[10]轮烯的碱诱导的偶联反应, 简便地合成3,3'-联-1,6-亚甲基桥[10]轮烯, 并用NMR, MS等波谱进行了表征.     

基于1,6-亚甲基桥[10]轮烯的多环化合物的合成

1,6-亚甲基桥[10]轮烯-4-溴-3-羧酸乙酯经LiAlH4还原后再在冰水浴下与PBr3反应制得3-溴甲基-4-溴-1,6-亚甲基桥[10]轮烯(3);3与PPh3在苯中回流,然后与对甲氧基苯甲醛进行Wittig反应,再经分子内异构化制得3-(p-甲氧基苯乙烯基)-4-溴-1,6-亚甲基桥[10]轮烯(trans-5);trans-5在钯盐催化下完成分子间耦合合成了基于1,6-亚甲基桥[10]轮烯的多环化合物,其结构经NMR,IR和MS表征.     

简便合成3,3′-联-1，6-亚甲基桥[10]轮烯

以1，6-二甲酰基环庚三烯为原料通过10π电子环化反应等3步反应制备了3-溴代-1，6-亚甲基桥[10]轮烯，通过3-溴代-1,6-亚甲基桥[10]轮烯的碱诱导的偶联反应，简便地合成3，3′-联-1，6-亚甲基桥[10]轮烯，并用NMR，MS等波谱进行了表征。     

无溶剂一锅法合成新型8-芳基-7,8-二氢-[1,3]二氧戊环并[4,5-g]喹啉-6(5H)-酮类化合物

采用微波辅助,经三组分(3,4-亚甲二氧基苯胺,2,2-二甲基-1,3-二氧六环-4,6-二酮和取代芳醛)无溶剂一锅法合成了10个新型的8-芳基-7,8-二氢-[1,3]二氧戊环并[4,5-g]喹啉-6(5H)-酮类化合物,产率75.7%~83.5%,其结构经1H NMR,FT-IR,ESI-MS和元素分析表征。     

八氢吡咯并[3,4-c]吡咯-2-碳酸叔丁酯的合成

建立了一种构建八氢吡咯并[3,4-c]吡咯烷类化合物母体双环结构的快速有效方法。以苄胺为原料,与氯甲基三甲基硅烷反应制得仲胺化合物(2);2与甲醇和甲醛反应得亚甲胺叶立德前体化合物(3);在三氟乙酸的诱导作用下,3与马来酰亚胺经1,3-偶极环加成反应得顺式加成产物(4);4经氢化铝锂还原得5-苄基八氢吡咯并[3,4-c]吡咯(5);5经Boc保护氨基后用氢氧化钯碳催化加氢脱苄合成了八氢吡咯并[3,4-c]吡咯-2-碳酸叔丁酯,总收率35%,其结构经1H NMR,IR和MS确证。     

2-叔丁基-4-氟-苯并氧杂卓并[3,4-b]喹啉并[9,11]二氧戊环-14（6H）-酮的合成

以2-溴甲基-6,7-亚甲二氧基-3-喹啉酸乙酯(1)为原料,经三步合成了2-叔丁基-4-氟-苯并氧杂卓并[3,4-b]喹啉并[9,11]二氧戊环-14(6H)-酮(4)。其中,6-(2-氟-4-叔丁基-苯氧甲基)-[1,3]二氧戊环并[4,5-g]喹啉-7-羧酸是经一锅法合成的。它的分子内闭环反应是在Eaton’s reagent(P2O5-CH3SO3H)的作用下,在较温和的条件下进行的。所得新化合物3和4的结构经IR1、H NMR和元素分析得以证实。     

新型硫杂杯[4]芳烃衍生物的合成

在对叔丁基硫杂杯[4]芳烃(1)的下缘1,3-位引入芳醛基制得硫杂杯[4]二醛基衍生物(3);3在水合肼中肼解制得硫杂杯[4]二醛腙基衍生物(4);4与5,5'-亚甲基二水杨酰基二水杨酰氯经缩合反应合成了具有桥连结构的硫杂杯[4]芳烃桥联氮杂衍生物(6),3,4和6为新化合物。其结构经1H NMR,IR,ESI-MS和元素分析表征。     

The synthesis of [1]benzothieno[2,3-c]quinolines, [1]benzothieno[2,3-c][1,2,4]triazolo[4,3-a]quinoline,and [1]benzothieno[2,3-c]tetrazolo[1,5-a]quinoline

Photocyclization of 3-chloro-N-phenylbenzo[b]thiophene-2-carboxamide 10 afforded [1]benzothieno[2,3-c]-quinolin-6(5H)-one 11 which was chlorinated to 6-chloro[1]benzothieno[2,3-c]quinoline 12 followed by dechlorination to give [1]benzothieno[2,3-c]quinoline 5 . A series of 6-substituted alkoxy and thioalkoxy[1]benzothieno[2,3-c]quinoline derivatives were prepared along with the N-methyl quaternary salt 13 of 5 . 6-Chloro[1]-benzothieno[2,3-c]quinoline 12 was converted into 6-hydrazino[1]benzothieno[2,3-c]quinoline 23 which upon treatment with formic acid yielded [1]benzothieno[2,3-c][1,2,4]triazolo[4,3-a]quinoline 6 . Treatment of 23 with nitrous acid resulted in [1]benzothieno[2,3-c]tetrazolo[1,5-a]quinoline 7 . Compounds 6 and 7 are novel heterocyclic ring systems.     

New [g]-fused [1,2,4]triazolo[1,5-c]pyrimidines: Synthesis of pyrido[3,2-e] and [4,3-e][1,2,4]triazolo[1,5-c]pyrimidine,pyrimido[5,4-e][1,2,4]triazolo[1,5-c]pyrimidine and [1,2,4]triazolo[1,5-c]pteridine derivatives

A number of 2-aryl-substituted pyrido[3,2-e] and [4,3-e][1,2,4]triazolo[1,5-c]pyrimidines and [1,2,4]triazolo[1,5-c]pteridines 11,12a,b,e , their corresponding 5-carbonyl derivatives 7,8a,b,e and some pyrimido[5,4-e][1,2,4]triazolo[1,5-c]pyrimidin-5-ones 7,8c,d have been synthesized, according to different pathways. The new tricyclic heterocycles were prepared with the aim of studying their possible benzodiazepine receptors affinity.     

Synthesis and characterization of [1,2,5]chalcogenazolo[3,4-f]benzo[1,2,3]triazole and [1,2,3]triazolo[3,4-g]quinoxaline derivatives

The synthesis and characterization is reported of low bandgap [1,2,5]chalcogenazolo[3,4-f]benzo[1,2,3]triazole and [1,2,3]triazolo[3,4-g]quinoxaline derivatives that display higher solubility and stability then their thiadiazole counterparts, [1,2,5]chalcogenazolo[3,4-f]benzo[2,1,3]thiadiazole and [1,2,5]thiadiazolo[3,4-g]quinoxaline, respectively.     

The synthesis of benzo[b]phenanthro[d]thiophenes and anthra[b]benzo[d]thiophenes

The synthesis of benzo[b]phenanthro[2, 3-d]thiophene ( 5 ), benzo[b]phenanthro[4, 3-d]thiophene ( 6 ), benzo-[b]phenanthro[2, 1-d]thiophene ( 9 ), benzo[b]phenanthro[3, 2-d]thiophene ( 14a ), anthra[1, 2-b]benzo[d]thiophene ( 24 ), anthra[2, 3-b]benzo[d]thiophene ( 29 ) and anthra[2, 1-b]benzo[d]thiophene ( 30 ) is described as well as the preparation of 13-methylbenzo[b]phenanthro[3, 2-d]thiophene ( 14b ).     

[1.1.1.1.1]paracyclophane and [1.1.1.1.1.1]paracyclophane

The first syntheses of [1.1.1.1.1]paracyclophane ($\text{1}$) and [1.1.1.1.1.1]paracyclophane ($\text{2}$) are described, featuring a trifluoroacetic acid promoted Friedel-Crafts cycloalkylation as the final step.     

Synthesis of [1,3]benzoxazino[2,3-k-and [2,4]benzodiazepino[3,2-k]-carbazole derivatives

Alkylation of 4a-methyl-, 4a,6-dimethyl- and 6-bromo-4a-methyl-2,3,4,4a-tetrahydro-1H-carbazoles using 2-chloromethyl-4-nitrophenol gives [1,3]benzoxazino[2,3-k]carbazoles. Derivatives of [2,4]benzodiazepino[3,2-k]carbazole have been synthesized by alkylation of the indicated carbazolenines using 2-bromomethylbenzonitrile followed by hydrolysis of the nitrile group of the 9-(2-cyanobenzyl)-carbazolium salts obtained to amide.Kaunas Technological University, Kaunas, LT-3028, Lithuania Translated from Khimiya Geterotsiklichenskikh Soedinenii, No. 6, pp. 818–821, June, 1999.