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ROMP gel

Barrett AGM, Bibal B, Hopkins BT, Kdebberling J, Love AC, Tedesebi L. Facile and purification free synthesis of peptides utilizing ROMP gel- and ROMP sphere-supported coupling reagents. Tetrahedron 2005 61 12033-12041. [Pg.132]

In order to carry out Stetter (and other) reactions in a highly parallel fashion and with minimal purification, it is necessary to immobilize the catalysts. This strategy should also allow for catalyst recycling, and was first addressed by Enders et al. [57]. Starting from the thiazole 60, Barrett and co-workers [58] have synthesized a ROMP gel-supported thiazolium iodide 61 which was successfully applied to Stetter reactions and afforded the products in high yield and purity (Scheme 9.17) [59]. [Pg.344]

Scheme 9.17 Synthesis of ROMP gel-supported thiazolium iodide 61. Scheme 9.17 Synthesis of ROMP gel-supported thiazolium iodide 61.
A polymer-supported TosMIC reagent 196 has been developed in which the isocyanide is attached to a ringopening metathesis polymer (ROMP gel) (Scheme 57). The use of this reagent significantly simplified the purification of the oxazole products <20010L271>. [Pg.520]

ROMP gel supported l-azo-2-oxopropylphosphonate (413) has been synthesized and the immobilized reagent successfully employed to convert a number of aldehydes possessing different substitution patterns into the corresponding terminal alkynes (414) (Figure 75). ... [Pg.364]

Barrett and coworkers found that the ROMP-gel anhydrides efficiently scavenge various amines as well as alcohols with high efficiency and purity (Scheme 8.26). [Pg.202]

Scheme 3 Cross metathesis of the supported Grubbs catalyst and a norbornene derivative to yield ROMP-gels 4. The polymer-supported catalyst 2 has also been used for ring-closing metathesis... Scheme 3 Cross metathesis of the supported Grubbs catalyst and a norbornene derivative to yield ROMP-gels 4. The polymer-supported catalyst 2 has also been used for ring-closing metathesis...
Triphenyl phosphine is an example of a gel modification additive that acts to retard the rate of reaction, when the catalyst has tricyclo-alkylphosphine ligands. The catalyst with tricycloalkylphosphines ligands is much more active in ROMP than when the ligands would be triphenyl phosphines. [Pg.14]

The ring-opened polymer of norbomadiene consists of 3,5-disubstituted cyclopentene units (94). When the concentration of these units is kept below 0.2 M the polymer remains soluble, but above this concentration, in the presence of WClg/Me4Sn (1/2), it gels. This is caused by cross-linking, brought about by the ROMP of the enchained cyclopentene... [Pg.1547]

See other pages where ROMP gel is mentioned: [Pg.354]    [Pg.381]    [Pg.190]    [Pg.192]    [Pg.193]    [Pg.279]    [Pg.200]    [Pg.202]    [Pg.202]    [Pg.222]    [Pg.208]    [Pg.499]    [Pg.354]    [Pg.381]    [Pg.190]    [Pg.192]    [Pg.193]    [Pg.279]    [Pg.200]    [Pg.202]    [Pg.202]    [Pg.222]    [Pg.208]    [Pg.499]    [Pg.215]    [Pg.359]    [Pg.157]    [Pg.636]    [Pg.225]    [Pg.30]    [Pg.146]    [Pg.345]    [Pg.317]    [Pg.337]    [Pg.12]    [Pg.156]    [Pg.167]    [Pg.29]    [Pg.116]    [Pg.427]    [Pg.3227]    [Pg.87]    [Pg.138]    [Pg.178]   
See also in sourсe #XX -- [ Pg.192 ]



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