Reactivity of cis-fused 3-(dialkylamino)cyclobutenes in polar and apolar solvents. Synthesis, x-ray structures, and reactions of cis,cis- and cis,trans-1,3-cycloalkadienes
N-alkenyltetracycline derivatives, for example, N-(1-methyl-2-.alpha.-naphthylethenyl)tetracycline represented by the formula ##SPC1## The compounds have excellent antibacterial action as compared with tetracycline.
N-alkenyltetracycline derivatives, for example, N-[1-methyl-2(2-thienyl)-1-butenyl]tetracycline represented by the formula ##SPC1## The compounds have excellent antibacterial action as compared with tetracycline.
A convenient one-pot preparation of bicyclic 2-pyridones from acyl isocyanates utilizing trimethylsilylketene
作者:Kiyo Takaoka、Toyohiko Aoyama、Takayuki Shioiri
DOI:10.1016/0040-4039(96)00983-5
日期:1996.7
4-Trimethylsiloxy-1,3-oxazin-6-ones, easily generated in situ from trimethylsilylketene and acyl isocyanates, smoothly react with the enamines of cycloalkanones to give bicyclic 2-pyridones.
Reductive cleavage of an SiCl3 group by amine hydrochlorides and base
作者:Dudley C. Snyder
DOI:10.1016/s0022-328x(00)98972-1
日期:1987.2
A new procedure has been developed for removing the SiCl3 group from α-trichlorosilyl-substituted amines. In this procedure the trichlorosilyl substrate is treated first with amine hydrochloride in CH3CN, followed by hydrolysis with aqueous hydroxide. Using this sequence, amines corresponding to replacement of the trichlorosilyl group with hydrogen can be conveniently isolated in good yields for all
Novel 4-(5H-dibenzo[a,d]cyclohepten-5-yl)-piperidine compounds of the formula:
are disclosed wherein the bond designation between the 10 and 11 positions indicates that the bond may be a saturated single bond or an unsaturated double bond,
X is hydrogen, halogen, trifluoromethyl or lower alkoxy;
R is, e.g., selected from the group consisting of:
a) a substituted aralkyl group represented by the formula:
wherein A is di(lower alkyl)amino or lower alkoxy;
b) an aralkenyl group represented by the formula:
where D is lower alkoxy;
c) a nitrogen containing alkyl group represented by the formula:
wherein Y is -CN,
or
d) an acyl group represented by the formula:
wherein R' is lower alkyl, substituted lower alkyl, phenyl or substituted phenyl, styryl or substituted styryl;
and acid addition salts thereof.
The compounds have the property of inhibiting calcium induced contraction of the smooth muscle.
式中的新型 4-(5H-二苯并[a,d]环庚烯-5-基)-哌啶化合物:
其中 10 和 11 位置之间的键表示该键可以是饱和单键或不饱和双键、
X 是氢、卤素、三氟甲基或低级烷氧基;
R是,例如,选自由下列组成的组
a) 取代的芳烷基,由式表示:
其中 A 是二(低级烷基)氨基或低级烷氧基;
b) 式中 D 代表低级烷氧基的芳烷基
其中 D 是低级烷氧基
c) 含氮烷基,由式表示:
其中 Y 为-CN、
或
d) 式中 R'为低级烷基、取代的低级烷基、苯基或取代的苯基的酰基:
其中 R'是低级烷基、取代的低级烷基、苯基或取代的苯基、苯乙烯基或取代的苯乙烯基;
及其酸加成盐。
这些化合物具有抑制钙诱导的平滑肌收缩的特性。