218 research outputs found
Total synthesis of the Amaryllidaceae alkaloid clivonine
Two syntheses of the Amaryllidaceae alkaloid clivonine (1) are described. Both employ previously reported 7-arylhydrindane 6 as an intermediate but differ in the method employed for subsequent introduction of what becomes the ring-B lactone carbonyl carbon (C7). The synthesis featuring a Bischler–Napieralski reaction for this transformation constitutes the first asymmetric synthesis of natural (+)-clivonine. Crystal structures for compounds (±)-13, (±)-16, (−)-20 and (±)-28 are also reported
ChemInform Abstract: UMLAGERUNG VON BROMHYDRINEN IN GEGENWART VON SILBERCARBONAT AUF CELITE
ChemInform Abstract: Chemistry of 1,4-Dioxene. Part 4. A General Method for the Preparation of 2-Oxoalkanal 1-Dithioacetals from Ketones.
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ChemInform Abstract: INFRAROTSPEKTREN VON GLYKOL 3. MITT. DARST. UND STEREOCHEMIE VON GLYKOLEN IN DER STEROID- UND DITERPEN-REIHE
ChemInform Abstract: CHEMISTRY OF 1,4-DIOXENE. II. A NEW METHOD FOR THE TWO-CARBON HOMOLOGATION OF F ALDEHYDES AND KETONES TO α-HYDROXYMETHYL KETONES
ChemInform Abstract: Synthetic Studies on Taxane Diterpenes. Part 2. Preparation of a Key Intermediate: 7-exo-Benzoyloxy-9,9-dimethyl-bicyclo[3.3.1]nonan-2,4-dione.
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