Experiments in the Colchicine Field. V. The Thermal and Photochemical Decomposition of Various 2-(β-Phenylethyl)-phenyldiazomethanes and 2-(γ-Phenylpropyl)-phenyldiazomethanes<sup>1</sup>
作者:C. David Gutsche、Emil F. Jason、Robert S. Coffey、Herbert E. Johnson
DOI:10.1021/ja01554a043
日期:1958.11
New triazine derivatives as potent modulators of multidrug resistance
A series of 70 triazine derivatives have been synthesized and tested for their capacity to modulate multidrug resistance (MDR) in DC-3F/AD and KB-A1 tumor cells in vitro, in comparison with verapamil (VRP), a calcium channel antagonist currently used in therapy as an antihypertensive drug, which also shows MDR modulating activity. Among the 12 selected compounds, 16 (S9788) showed high MDR reversing properties in vitro (300- and 6-fold VRP at 5-mu-M in DC-3F/AD and KB-A1 cells, respectively) and induced a strong accumulation of adriamycin. The relationship between the increase of ADR accumulation and the fold reversal induced by these compounds and their lack of effects on the sensitive DC-3F cells suggest that they act mainly by inhibiting the P-glycoprotein (Pgp) catalyzed efflux of cytotoxic agents, as already described for a majority of MDR modulators. In vivo, in association with the antitumor drug vincristine (0.25 mg/kg), 16 (100 mg/kg) increased the TIC by 39% in mice bearing the resistant tumor cell line P388/VCR. According to these interesting properties, 16 was selected for a clinical development because it was more bioavailable than 34, even though it was less active.
.beta.-Iodo Ketones by Prevost Reaction Of Vinyl Carbinols
作者:Engelbert Ciganek、J. C. Calabrese
DOI:10.1021/jo00119a021
日期:1995.7
Treatment of alpha-ethenyl-alpha-phenylbenzenemethanol with iodine and silver acetate in either acetic acid or benzene gave 1,2-diphenyl-3-iodo-1-propanone (6) in 85% yield. Ring enlargements involving similar rearrangements were observed with a number of cyclic vinyl carbinols. In some cases, mixtures of normal Prevost products and rearranged beta-iodo ketones were obtained. The exact scope of this apparently novel reaction remains to be elucidated. Treatment of the beta-iodo ketones with DBU gave the corresponding alpha,beta-unsaturated ketones from which a number of amino ketones and amino alcohols were prepared by conjugate addition followed by reduction.
Banciu, Mircea D.; Drǎghici, Constantin; Popescu, Angela, Revue Roumaine de Chimie, 1998, vol. 43, # 7, p. 649 - 660
作者:Banciu, Mircea D.、Drǎghici, Constantin、Popescu, Angela、Banciu, Anca、Simion, Alina
DOI:——
日期:——
Transannular reactions of dibenzo[a,d]cycloalkenes. 2. Synthesis of bridgehead substituted dibenzo[a,d]cycloalkenimines by a regiospecific transannular amine to olefin addition
作者:Ben E. Evans、Paul S. Anderson、Marcia E. Christy、C. Dylion Colton、David C. Remy、Kenneth E. Rittle、Edward L. Engelhardt