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Benzyl bispidine as an e ffi cient replacement for ( )-sparteine in ring opening polymerisation †
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tempelaar, Sarah |
| Copyright Year | 2013 |
| Abstract | The synthesis and application of a dibenzyl-functionalized bispidine, in combination with 1-(3,5bis(trifluoromethyl)phenyl)-3-cyclohexylthiourea (TU) co-catalyst, has been demonstrated to be an excellent catalyst for the controlled ring-opening polymerisation (ROP) of lactide and cyclic carbonate monomers. Notably, the polymerisation proceeds with negligible transesterification or epimerisation, with the polymerisation of stereopure L-lactide affording highly crystalline poly(lactide) with a Tm of 156 C. ROP of racemic lactide results in the observation of a modest degree of stereocontrol such that the probability of isotactic enchainment, Pm 1⁄4 0.74. Comparison of a range of alternative hydrogen bond donor co-catalysts revealed that TU displayed the highest polymerisation rates in combination with the dibenzyl-functionalized bispidine. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2013/sc/c2sc22053a |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
