ÜberVerbindungen mit Urotropin-Struktur,XLVII。具有Urotropin结构的神经元Weg zu 1.2-和2.6-二取代金刚烷胺化合物,XLVII。1,2-和2,6-双取代的金刚烷的新合成
摘要:
吡咯烷酮-环己酮-氨基壬酸酯-(4)-碳-(1)-乙基酯(1)mit 2-溴甲基-丙烯酸-脲酯liefert Adamantandion-(2.6)-碳-脲-(1)-乙基酯(2)。6-雄激素2金刚烷酮(2)carbonsäure-(1)-乙基酯(7)中的Durch选择性还原羰基化合物。1-维奇-adamantandion-(2.6)(8)IST第三人以Silbersalzabbau DER AUS 2 erhaltenenSäure 5 zugänglich。Bromverbindung ist durch Reduktion Adamantandion-(2.6)(12)und durch Favorski -Reaktion Noradamantanon-(4)-carbonsäure-(1)(10)erhältlich。
Effect of Remote Substitution on Face Selection in Addition Reactions of Nor- and Homoadamantan-9-ones and of Several Analogues
摘要:
The effects of 3-halo substitution on face selection in borohydride reductions of both nor-and homoadamantan-9-ones l-X and 3-X. respectively, have been compared with those of 5-halo substitution in the parent 5-haloadamantan-2-ones 2-X, The differences between the product ratios in these three compounds are small, but the selectivity of 2-X is somewhat larger than that of either of the homologues. This is also true of the corresponding aza-and diazaadamantanones, and of an electrophilic addition. It is concluded that the approach angle of the reagent is not a sensitive variable in addition reactions of cyclohexanone and its derivatives, and that well-aligned antiperiplanar bonds are preferred to achieve maximal remote substituent induced selectivities.
There is provided a novel xanthine Compound(I) ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and each represent hydroxy-substituted, oxo-substituted or unsubstituted lower alkyl, Y is a single bond or alkylene, and Q is ##STR2## wherein R.sup.3 and R.sup.4 are the same or different and each represent hydrogen or hydroxy, n is 0 or 1; provided that when both of R.sup.3 and R.sup.4 are hydrogen, at least one of R.sup.1 and R.sup.2 is hydroxy-substituted or oxo-substituted lower alkyl; or a pharmaceutically acceptable salt thereof. The xanthine compound has adenosine A.sub.1 receptor antagonizing activity, and thus shows diuretic effect, renal-protecting effect, bronchodilatory effect, cerebral function improving effect and anti-dementia effect.
There is provided a novel xanthine Compound(I)
wherein R¹ and R² are the same or different and each represent hydroxy-substituted, oxo-substituted or unsubstituted lower alkyl, Y is a single bond or alkylene, and Q is
wherein R³ and R⁴ are the same or different and each represent hydrogen or hydroxy, n is 0 or 1; provided that when both of R³ and R⁴ are hydrogen, at least one of R¹ and R² is hydroxy-substituted or oxo-substituted lower alkyl; or a pharmaceutically acceptable salt thereof.
The xanthine compound has adenosine A₁ receptor antagonizing activity, and thus shows diuretic effect, renal-protecting effect, bronchodilatory effect, cerebral function improving effect and anti-dementia effect.
Compounds with Urotropin Structure, XLVII. A New Syntheses of 1,2 ‐ and 2, 6‐Disubstituted Adamantanes
作者:Hermann Stetter、Hans Güunter Thoma、Klaus Meyer
DOI:10.1002/cber.19701030328
日期:1970.3
äthylester (1) mit 2-Brommethyl-acrylsäureester liefert Adamantandion-(2.6)-carbonsäure-(1)-äthylester (2). Durch selective Reduktion der Carbonylgruppe in 6-Stellung entsteht aus 2 Adamantanon (2)carbonsäure-(1)-äthylester (7). 1-Brom-adamantandion-(2.6) (8) ist durch Silbersalzabbau der aus 2 erhaltenen Säure 5 zugänglich. Aus der Bromverbindung ist durch Reduktion Adamantandion-(2.6) (12) und durch
吡咯烷酮-环己酮-氨基壬酸酯-(4)-碳-(1)-乙基酯(1)mit 2-溴甲基-丙烯酸-脲酯liefert Adamantandion-(2.6)-碳-脲-(1)-乙基酯(2)。6-雄激素2金刚烷酮(2)carbonsäure-(1)-乙基酯(7)中的Durch选择性还原羰基化合物。1-维奇-adamantandion-(2.6)(8)IST第三人以Silbersalzabbau DER AUS 2 erhaltenenSäure 5 zugänglich。Bromverbindung ist durch Reduktion Adamantandion-(2.6)(12)und durch Favorski -Reaktion Noradamantanon-(4)-carbonsäure-(1)(10)erhältlich。
Effect of Remote Substitution on Face Selection in Addition Reactions of Nor- and Homoadamantan-9-ones and of Several Analogues
作者:Mira Kaselj、Elena M. Gonikberg、William J. le Noble
DOI:10.1021/jo9718197
日期:1998.5.1
The effects of 3-halo substitution on face selection in borohydride reductions of both nor-and homoadamantan-9-ones l-X and 3-X. respectively, have been compared with those of 5-halo substitution in the parent 5-haloadamantan-2-ones 2-X, The differences between the product ratios in these three compounds are small, but the selectivity of 2-X is somewhat larger than that of either of the homologues. This is also true of the corresponding aza-and diazaadamantanones, and of an electrophilic addition. It is concluded that the approach angle of the reagent is not a sensitive variable in addition reactions of cyclohexanone and its derivatives, and that well-aligned antiperiplanar bonds are preferred to achieve maximal remote substituent induced selectivities.