Palladium-Catalyzed Diastereoselective Cyclization of the Allylic Precursors. A Concise Synthetic Route to 3-Azabicyclo[3.3.0]Octane and Hydroisoindole Skeletons
摘要:
A useful variant of palladium-catalyzed 1,2-diastereoselective cyclization of the allylic precursors based on the steric nature of the anion stabilizing groups has been developed. The 1,1,2-trisubstituted cycloalkane products have also been efficiently transformed into the azabicyclic systems.
Regiospecific carbon—carbon bond formation at α and β positions in cyclic ketones via double Michael addition to α-methylene-β-alkoxy cyclic ketone
作者:Takashi Takahashi、Kimihiko Hori、Jiro Tsuji
DOI:10.1016/0040-4039(81)80164-5
日期:——
Very reactive 2-methylene-3-alkoxycyclohexanone was synthesized. The 1,4-conjugate addition of various nucleophiles to this enone gave only β′-alkylated 2-cyclohexenone with simultaneous elimination of the β-alkoxy group. The second 1,4-conjugate addition of other nucleophile to the resulting cyclohexenone leads to the α and β disubstituted ketones.
Stereoselective Addition of a Lithium Anion of 1,1-Diphenyl-2-aza-pentadiene to Sulfinimines: Application to the Synthesis of (−)-Epiquinamide
作者:Manoj B. Uphade、Arava Amaranadha Reddy、Sopan P. Khandare、Kavirayani R. Prasad
DOI:10.1021/acs.orglett.9b03507
日期:2019.11.15
of diphenylallylimine to nonracemic sulfinimines was investigated. It was found that the reaction with sulfinimines derived from aliphatic aldehydes afforded the products with excellent diastereoselectivity (>99:1), furnishing the product vicinal diamines in very good yields. Application of the formed product vicinal diamines was demonstrated in the total synthesis of the natural product (−)-epiquinamide
3'-DEAMINO-3'-(2"-PYRROLINE-1"-YL)-5-IMINO-13-DEOXYANTHRACYCLINES AND METHODS OF PREPARATION
申请人:Gem Pharmaceuticals, LLC
公开号:US20180230175A1
公开(公告)日:2018-08-16
2-pyrrolino-13-deoxyanthracycline derivatives, medical uses thereof, and a process for making them. A 2-pyrrolino-13-deoxyanthracycline and a 13-deoxyanthracycline can be administered to a patient simultaneously or sequentially in amounts to produce a synergistic therapeutic effect with increased potency and efficacy, compared to the sum of the effects of each drug when administered alone. A composition or preparation of a 2-pyrrolino-13-deoxyanthracycline and a 13-deoxyanthracycline for producing a potent anticancer therapeutic effect is also provided.