Acid-catalyzed ring-opening reactions of a cyclopropanated 3-aza-2-oxabicyclo[2.2.1]hept-5-ene with alcohols

• Katrina Tait,
• Alysia Horvath,
• Nicolas Blanchard and
• William Tam

Beilstein J. Org. Chem. 2017, 13, 2888–2894, doi:10.3762/bjoc.13.281

• ; alcohol nucleophiles; cyclopropanation; heterobicyclic compounds; ring-opening reactions; Introduction Heterobicyclic alkenes are useful templates to generate complex cyclic and acyclic systems [1][2]. 3-Aza-2-oxabicyclic alkenes are particularly interesting due to their asymmetric nature and the ability

N–O Cleavage reactions of heterobicycloalkene-fused 2-isoxazolines

• Jaipal R. Nagireddy,
• Geoffrey K. Tranmer,
• Emily Carlson and
• William Tam

Beilstein J. Org. Chem. 2014, 10, 2200–2205, doi:10.3762/bjoc.10.227

• cleavage of carbobicycle-fused 2-isoxazolines converts both exo- and endo stereoisomers of 8 into the corresponding single isomer of cyclopentene 9 (Table 1) [20]. Since then, we have been interested in the outcomes of cleavage reactions of 2-isoxazolines fused to heterobicyclic compounds 10 or 11, which

A short synthesis of (±)-cherylline dimethyl ether

• Bhima Y. Kale,
• Ananta D. Shinde,
• Swapnil S. Sonar,
• Bapurao B. Shingate,
• Sanjeev Kumar,
• Samir Ghosh,
• Soodamani Venugopal and
• Murlidhar S. Shingare

Beilstein J. Org. Chem. 2009, 5, No. 80, doi:10.3762/bjoc.5.80

• class of compounds and their increasing medicinal interest. Among these heterobicyclic compounds cherylline (1) (Figure 1), a rare phenolic 4-phenyltetrahydroisoquinoline alkaloid, and its dimethyl ether 5 (Scheme 1). Their structures are unique among the Amaryllidaceae alkaloids [1][2] and they have