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Double bonds linked by C and N atoms

Ol n Metathesis and Metathesis Polymerization 8.4 Double bonds linked by C and N atoms [Pg.158]

Dienes in which the double bonds are separated by 4, 5, or 6 bonds, and linked through amine or amide functions, readily undergo RCM in the presence of various initiators to yield substituted unsaturated cyclic amines or amides (pyrrolidinones, piperidinones, piperidines) see Table 8.4. [Pg.158]

With catalyst 18 one can also carry out RCM in compounds containing unprotected peptidic stmctures, as illustrated by eqn. (11) (Miller 1995b). [Pg.159]

5 Double bonds Unked by C and O atoms 8.5.1 Ethers and formats [Pg.160]

Examples of such reactions are shown in Table 8.5. Divinyl ether is unreactive but diallyl ether, when treated in bulk with 8, gives an equilibrium mixture of 63% 2,5-dihydrofuran and 37% of its -trans, ring-opened polymer, albeit of low MW (Fig. 8.3). The analogous tungsten complex is not a good initiator for the ADMET polymerization of diallyl ether. [Pg.160]




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Atom bonding

Atomic bonding

Atomization by atomizer

Atoms and bonds

Atoms bonds

Bonding and double bonds

Bonds atomic

C atom

C-N bond

C=N double bond

Double links

Link atom

Linked-atom

N-linked

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