2-[(Arylmethyl)amino]-2-methyl-1,3-propanediol DNA intercalators. An examination of the effects of aromatic ring variation on antitumor activity and DNA binding
摘要:
The effects of variation of aromatic ring size, shape, and side-chain position on antitumor activity and DNA binding in a series of carbocyclic 2-[(arylmethyl)amino]-2-methyl-1,3-propanediols (AMAPs) were examined. In general, the interaction of AMAPs with DNA increases as the intercalating ring system grows in area, with three distinct binding levels evident. Isomers from a specific ring system appear to bind DNA similarly. DNA binding is not the sole criterion for antitumor activity for the AMAPs studied; the magnitude of the DELTA-T(m) does not correlate with the antitumor activity observed. Significant in vivo P388 activity was seen for AMAP congeners from several tetracyclic ring systems. However, isomers from each of the specific ring systems produced a wide range of in vivo P388 activity. Thus, AMAP antitumor activity is not a function of the ring system per se, but rather appears to be related to the shape of the specific molecule. Three AMAP congeners (crisnatol (770U82, 773U82, and 502U83) are currently in clinical trials.
We report here a two-in-one strategy for the Pd(II)-catalyzed tandem C–H arylation/decarboxylative annulation between readily available cyclic diaryliodoniumsalts and benzoic acids. The carboxylic acid functionality can be used as both a directing group for the ortho-C–H arylation and the reactive group for the tandem decarboxylative annulation. By a step-economical double cross-coupling annulation
C–C Bond (Hetero)arylation of Ring-Fused Benzocyclobutenols and Application in the Assembly of Polycyclic Aromatic Hydrocarbons
作者:Wenbin Mao、Chen Zhu
DOI:10.1021/acs.joc.7b01727
日期:2017.9.1
efficient synthetic approach to triphenylene-based polycyclic aromatic hydrocarbons (PAHs) from ring-fused benzocyclobutenols (RBCBs) through the cleavage of the C–C σ-bond. Two key transformations are involved: (a) palladium-catalyzed C–C bond (hetero)arylation of RBCBs; and (b) Lewis acid-promoted intramolecular annulation leading to complex polycyclic compounds. A variety of multiply substituted triphenylenes
Palladium Catalyzed C–I and Vicinal C–H Dual Activation of Diaryliodonium Salts for Diarylations: Synthesis of Triphenylenes
作者:Xunshen Wu、Jianwei Han、Limin Wang
DOI:10.1021/acs.joc.7b01905
日期:2018.1.5
we report an approach for direct diarylations of 2-bromobiphenyls or bromobenzenes. As a result, a wide range of triphenylenes with various substituents have been synthesized in good yields. These triphenylenes are expected to be employed in the “bottom-up” synthesis of functional aromatic molecules in material science.
Two new palladium‐catalyzed reactions of aromatic sulfur compounds enabled the conversion of dibenzothiophenes into triphenylenes in four steps. This transformation of one aromatic framework into another consists of 1) 4‐chlorobutylation of the dibenzothiophene to form the corresponding sulfonium salt, 2) palladium‐catalyzed arylative ring opening of the sulfonium salt with a sodium tetraarylborate
芳香族硫化合物的两个新的钯催化反应使二苯并噻吩在四个步骤中转化为苯并菲。一种芳族骨架向另一种芳族骨架的转化包括:1)二苯并噻吩的4-氯丁基化反应形成相应的sulf盐; 2)钯盐与四芳基硼酸钠的钯催化的芳基开环反应; 3)分子内S N 2反应以形成teraryl锍盐,和4)的钯催化的分子内ç S / C H至电palladation耦合。以量身定制的方式合成了所需的对称和不对称的三亚苯基,其总收率令人满意。