No coin nor oath required. For personal study only.
coiidciisiitioii of ctliyl Icvuliantc (1') did not givc I .3-cyc.lopciitniic-dioiic so fnr ; tlic ' prodrict, whicli r~~ialysetl sntisfnctorily for tlic dcsircd dilxtoiic, Iind nii uues~icctcdly high boiling-point niid gnvc no coloiir rcnctioii with ferric clilnritlc solution.
1 -(6'-iiictlioxy-2' -iinplitliyl)-1cyclopcntcnc-3 -ncctic acid (T').-'I!lic Grigiinrtl solution, prcpnrcd from iiingncsiuiii (2.S g.) niid 6-rtictliosy-2-brotiio-ti~i~~~it~in-]cue3 (16 g.), reacted riolciitly with ctliyl cyclopciitnnonc-2-ncctntcJ (l!) g.). Aftcr dcconiposition of tlic rcnction niixturc with cold tliltitc sulpliiiric acid, tlic ctlicrcnl Inyer. froiii whicli seine ci * 6'-tliiiicthosy-2 2'-tli-iiiiplitliyl
froin ethyl iniilonntc Icitflcts, 11i.p. 251" ; found C:, 83.7 ; 11, 5.1, : C'221i,,0, requires C', S4 -1 : IT, 5.7%) lriitl sepriitcd. ivns cstrnctctl witti sodiiiin cnr1)ori:itc solution nntl tlic ncitl prccipitntcd ns an oil, wliicli solidifictl quickly. Froni bcnacnc-liglit ~~ctrolcuni or from riictlrniiol bronc1 Icnflcts, 1ii.p. 12Oo-12l0 (fouiitl : (', 76. 1 ; 76.3 ; H, i * ( ~ : 6.9 : C,,TIIBO, requires C! , 7 6 . 6 : II, G.4Yo). to nlcold-frcc sotliuni ctliositlc (1 niol.) in dry cthcr, n coloiirlcss Imcipitntc h i n g foriiictl. 1 t ~v a s dcconiposctl \.it11 wntcr, thc iiqiicoiis soli~tion cstriictctl cigniii with cthcr, iicitlificcl niid tlic 1irotlirct isoliitctl with ctlicr. Thc oil obtriiiicd lint1 b.11. 151'/0.9 i n i n . (fonntl : C, 61.1 ; Ethyl Icvlllillntc~ ( I inol., b.1'. loo'p I 1I1IIl.) WilS ilddCt1 GI -3 ; TI, 6 . 5 , 6 . 6 ; C51r,0, rcquircs C, 61.2 ; II, G.lYo). REFERENCES ' Jllllrll. ClIClll. SOC., 1938, 1:190, 10!)4. 2 Coni~inre โฌIoiiIJrii-\VqI, ~Ictliotlcii dcr f~rgiiiiisc1)cii Clieiiii~, 3 hits niitl Scliiniinclsclimic!t. ncr. 1)thcIi. Cliviii. Gcs., 58, J Kwtz, Licliig's Aiiiinlcn, 350, 135 (I!lOfJ]. 5 O r g i ~n i c s ~~~t l ~~~~c s , Collcctirr 'olutni~, p.39S ( I ! W ) ; I<iizickn, Vnl. l V , 1). 647 (Leipig, 1924). '7340 (1925). Ikr. Ilthrli. Cliein. GcH., 50, 1 3 i 7 (1917).
๐ SIMILAR VOLUMES
## Abstract A simple, reliable and sensitive liquid chromatography tandem mass spectrometry (LCโMS/MS) protocol was developed and validated for quantification of bisoprolol in human plasma. The sample was pretreated with a simple procedure of protein precipitation and an isotopeโlabeled d5โbisoprol
## Abstract d~3~โCerivastatin was synthesized as an internal standard for use in a LC/MS/MS method developed for the simultaneous quantitative determination of the drug in human serum. d~3~โCerivastatin was efficiently prepared on large scale from d~3~โiodomethane using improved procedures. Copyrig
being built up from a limited set of elements and a few rules for combining them and that the production technique provided useful information about the nature of the elements and rules. Subjects employed several classes of elements performing syntactically different functions in their drawings. Al