Selectivite de la reduction de l'androsten-4 dione-3,17 et de la progesterone par divers borohydrures: role de l'assistance electrophile par le cation ou un solvant hydroxyle
The reduction of Δ4-androsten-3, 17 dione 1 and of progesterone 2 by nBu4NBH4 is highly chemioselective: in THF only the a-enone moiety is reduced, the saturated C17 or C20 keto group being kept unchanged. When TMEDA is added, saturated alcohols are obtained, without any allylic alcohol when the reaction goes to completion. However this reduction is poorly stereoselective as 70:30 mixtures of A/B cis
作者:Brendan J. Hussey、Robert A.W. Johnstone、Peter Boehm、Ian D. Entwistle
DOI:10.1016/0040-4020(82)80090-2
日期:1982.1
Zinc bis-tetrahydroborate forms a solid complex with dimethylformamide (DMF) of composition, Zn(BH4)2 1.5DMF. Unlike zinc bis-tetrahydroborate itself, the complex with DMF can be stored as a solid at room temperature. Ketones and aldehydes are reduced to the corresponding alcohols by the complex but the mechanism of reduction appears to be different from that using zinc bis-tetrahydroborate itself
Vaginal inserted estradiol pharmaceutical compositions and methods
申请人:TherapeuticsMD, Inc.
公开号:US10471072B2
公开(公告)日:2019-11-12
In one aspect, pharmaceutical compositions and methods for the treatment of vulvovaginal atrophy (VVA) are provided. In one embodiment, the method comprises digitally inserting into the lower third of the vagina of a subject having VVA a soft gelatin capsule containing a liquid pharmaceutical composition.
VAGINAL INSERTED ESTRADIOL PHARMACEUTICAL COMPOSITIONS AND METHODS
申请人:TherapeuticsMD, Inc.
公开号:US20180161345A1
公开(公告)日:2018-06-14
In one aspect, pharmaceutical compositions and methods for the treatment of vulvovaginal atrophy (VVA) are provided. In one embodiment, the method comprises digitally inserting into the lower third of the vagina of a subject having VVA a soft gelatin capsule containing a liquid pharmaceutical composition.