Pentafluorophenyl carbamates

Nitrophenyl carbamates (R R2NC02Np) and related aryl carbamates, e.g. phenyl-, di-nitrophenyl-, trichlorophenyl-, and pentafluorophenyl carbamates, provide an additional route by which an Na-free peptide can be condensed with another amine (peptidic or... [Pg.597]

Ethyl frfl/is-l,3-butadiene-l-carbamate, 59, 5 Ethyl butyrylacetate, 55, 73, 75 Ethyl carbamate, 57, 95 Ethyl chloroformate, 59, 2 Ethyl cyanoacetate, 55, 58, 60 57,80 ETHYL 1-CYANO-l-METHYLCYCLO-HEXANECARBOXYLATE, 55, 57 Ethyl 7-2-cyano-6-octenoate, 55,57 Ethyl cyano(pentafluorophenyl)acetate,... [Pg.117]

Like carbene insertions into carbon-hydrogen bonds, metal nitrene insertions occur in both intermolecular and intramolecular reactions.For intermole-cular reactions, a manganese(III) meio-tetrakis(pentafluorophenyl)porphyrm complex gives high product yields and turnovers up to 2600 amidations could be effected directly with amides using PhI(OAc)2 (Eq. 51). The most exciting development in intramolecular C—H reactions thus far has been the oxidative cychzation of sulfamate esters (e.g., Eq. 52), as well as carbamates (to oxazolidin-2-ones), ° and one can expect further developments that are of synthetic... [Pg.585]

Ethyl bromide, 57, 66, 58, 1, 2, 4 Ethyl carbamate, 57, 95 Ethyl cyanoacetate, 57, 80 Ethyl cyano(pentafluorophenyl)acetate,... [Pg.184]

When pentafluorophenylthioureas or pentafluorophenyl thio- or dithio-carbamates are heated in DMF, they cyclize to give 4,5,6,7-tetrafluorobenzo-... [Pg.187]

Big Chemical Encyclopedia