Overarching
principles for salting-out extraction are long-established
but poorly disseminated. We highlight the opportunity for more widespread
application of this technique using the Hofmeister series as a foundational
basis for choosing the right salt. The power of this approach is exemplified
by the aqueous workup of a highly water-soluble nucleoside in which
the use of sodium sulfate allowed for high recoveries without relying
on back extraction.
The bisorbicillinoids are a growing class of novel natural products endowed with unique biological
activity and are associated with fascinating hypotheses for their biosynthesis. A full account of our biomimetic
explorations toward the bisorbicillinoids including the total syntheses of bisorbicillinol (1), bisorbibutenolide
(2), and trichodimerol (4) from sorbicillin (3) is disclosed. Utilizing the novel dimerization reactions discovered
and fine-tuned en route to 1 and 4, several analogues of these natural products have been synthesized.
Furthermore, studies on the scope of these novel cycloaddition reactions and the isolation of a number of
unexpected products along with proposed mechanisms for their formation are reported. These findings add to
our knowledge of the largely unexplored chemistry of o-quinols and related aromatic systems.
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