4946-37-6Relevant articles and documents
TETRAZINES FOR HIGH CLICK RELEASE SPEED AND YIELD
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Page/Page column 215; 220, (2021/01/22)
Disclosed herein are tetrazines substituted with groups that result in a high click conjugation yield and high click release yields. In some of several other aspects, the invention relates to combinations and kits comprising said tetrazines and a dienophile, preferably a trans-cyclooctene. In another aspect, the compounds, combinations, and kits are for use as a medicament.
Efficient enzymatic routes for the synthesis of new eight-membered cyclic β-amino acid and β-lactam enantiomers
Forró, Eniko,Kiss, Loránd,árva, Judit,Fül?p, Ferenc
, (2018/01/17)
Efficient enzymatic resolutions are reported for the preparation of new eight-membered ring-fused enantiomeric β-amino acids [(1R, 2S)-9 and (1S, 2R)-9] and β-lactams [(1S, 8R)-3, (1R, 8S)-3 (1S, 8R)-4 and (1R, 8S)-7], through asymmetric acylation of (±)-4 (E > 100) or enantioselective hydrolysis (E > 200) of the corresponding inactivated (±)-3 or activated (±)-4 β-lactams, catalyzed by PSIM or CAL-B in an organic solvent. CAL-B-catalyzed ring cleavage of (±)-6 (E > 200) resulted in the unreacted (1S, 8R)-6, potential intermediate for the synthesis of enantiomeric anatoxin-a. The best strategies, in view of E, reaction rate and product yields, which underline the importance of substrate engineering, are highlighted.
Tandem reactions of anions: A short and efficient route to ±anatoxin-a
Parsons, Philip J.,Camp, Nicholas P.,Underwood, J. Mark,Harvey, Darren M.
, p. 11637 - 11642 (2007/10/03)
A new route to anatoxin-a (1) is reported which involves an anionically induced small ring opening/ring closure/ring opening cascade. The azabicyclo [4.2.1]nonane ring system of anatoxin-α is hence formed in one synthetic operation.
