Lawer, Aggie published the artcileInternal Nucleophilic Catalyst Mediated Cyclisation/Ring Expansion Cascades for the Synthesis of Medium-Sized Lactones and Lactams, COA of Formula: C15H21BO4, the publication is Angewandte Chemie, International Edition (2019), 58(39), 13942-13947, database is CAplus and MEDLINE.
A strategy for the synthesis of medium-sized lactones and lactams from linear precursors is described in which an amine acts as an internal nucleophilic catalyst to facilitate a novel cyclisation/ring expansion cascade sequence. This method obviates the need for the high-dilution conditions usually associated with medium-ring cyclisation protocols, as the reactions operate exclusively via kinetically favorable “normal”-sized cyclic transition states. This same feature also enables biaryl-containing medium-sized rings to be prepared with complete atroposelectivity by point-to-axial chirality transfer.
Angewandte Chemie, International Edition published new progress about 956229-86-0. 956229-86-0 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester,Benzene,Ester,Boronate Esters,Boronic acid and ester, name is Methyl 2-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate, and the molecular formula is C15H21BO4, COA of Formula: C15H21BO4.
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