Lithium calix[4]arenes: structural studies and use in the ring opening polymerization of cyclic esters.

ABSTRACT: We have structurally characterized a number of lithiated calix[4]arenes, where the bridge in the calix[4]arene is thia (-S-, L^SH₄), sulfinyl (-SO-, L^SOH₄), sulfonyl (-SO₂-, L^SO2H₄), dimethyleneoxa (-CH₂OCH₂-, L^COCH₄) or methylene (-CH₂-, LH₄). In the case of L^4SH₄, interaction with LiOtBu led to the isolation of the complex [Li₈(L^4S)₂(THF)₄]·5THF (1·5THF), whilst similar interaction of L^4SOH₄ led to the isolation of [Li₆(L^4SOH)₂(THF)₂]·5(THF) (2·5THF). Interestingly, the mixed sulfinyl/sulfonyl complexes [Li

SUBMITTER: Santoro O 

PROVIDER: S-EPMC8695813 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature