Synthesis of macrocyclic and medium-sized ring thiolactones <i>via</i> the ring expansion of lactams
نویسندگان
چکیده
A method to ring expand lactams into macrocyclic thiolactones is reported that can be incorporated successive expansion sequences.
منابع مشابه
Synthesis of Medium Ring and Macrocyclic Acetylenic Lactones by the Ring Expansion of Oxabicycloalkenones
Lactonas acetilênicas de tamanho médio e macrocíclico 15a-e [6-decin-9-olídeo (15a), 7-undecin-10-olídeo (15b), 8-dodecin-11-olídeo (15c), 12-hexadecin-15-olídeo (15d) e 5-decin-9olídeo (15e)] foram preparadas a partir de oxabiciclo-alquenonas 7a-d e 2, respectivamente, pela expansão de anel das tosil-hidrazonas 16a-e, efetuada pela reação com N-bromo-succinimida, sob condições rigorosamente co...
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Some new b-lactams bearing biologically important morpholine ring have been synthesized by acylation of amino b-lactams in the presence of morpholine-4-carbonyl chloride. These novel β-lactams were prepared under mild reaction conditions without any solvent in short reaction times. Their biological activities have been examined against microbial agents such as Staphylococcus aureus (S. aureus),...
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Some new b-lactams bearing biologically important morpholine ring have been synthesized by acylation of amino b-lactams in the presence of morpholine-4-carbonyl chloride. These novel β-lactams were prepared under mild reaction conditions without any solvent in short reaction times. Their biological activities have been examined against microbial agents such as Staphylococcus aureus (S. aureus),...
متن کاملA convenient synthesis of difficult medium-sized cyclic peptides by Staudinger mediated ring-closure.
Novel, efficient and mild preparation of 7- and 8-membered cyclic di- and 10-membered cyclic tripeptides containing α-, β- or γ-amino acid residues is effected by a Staudinger-mediated ring closure. Medium-sized cyclic di- and tripeptides--recognized as difficult targets--were obtained in moderate to good yields according to a straightforward sequence. Empirical force-field calculations were un...
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ژورنال
عنوان ژورنال: Organic and Biomolecular Chemistry
سال: 2021
ISSN: ['1477-0520', '1477-0539']
DOI: https://doi.org/10.1039/d0ob02502j