Alder; Backendorf, Justus Liebigs Annalen der Chemie, 1938, vol. 535, p. 113,120
作者:Alder、Backendorf
DOI:——
日期:——
Total Synthesis of Neo-Tanshinlactones through a Cascade Benzannulation-Lactonization as the Key Step
作者:Ketaki Ghosh、Raju Karmakar、Dipakranjan Mal
DOI:10.1002/ejoc.201300102
日期:2013.7
The cascade annulation-lactonization of phthalides with α-carboxyfurylacrylates in the presence of lithium hexamethyldisilazide (LiHMDS) provides both convergent and semiconvergent regioselective syntheses of neo-tanshinlactones in moderate yields. This methodology also offers an avenue for the direct syntheses of hitherto unreported 6-alkoxycarbonyl-substituted neo-tanshinlactones and their heterocyclic
Substituted Phthalic Anhydrides from Biobased Furanics: A New Approach to Renewable Aromatics
作者:Shanmugam Thiyagarajan、Homer C. Genuino、Michał Śliwa、Jan C. van der Waal、Ed de Jong、Jacco van Haveren、Bert M. Weckhuysen、Pieter C. A. Bruijnincx、Daan S. van Es
DOI:10.1002/cssc.201500511
日期:2015.9.21
A novelroute for the production of renewable aromatic chemicals, particularly substituted phthalic acid anhydrides, is presented. The classical two‐step approach to furanics‐derived aromaticsvia Diels–Alder (DA) aromatization has been modified into a three‐step procedure to address the general issue of the reversible nature of the intermediate DA addition step. The new sequence involves DA addition