The court held that since "one cannot chose from the unknown" and "one having no knowledge of this acid could hardly find it obvious to make any cephem using this acid as an acylating
agent, much less the particular cephem," the process was nonobvious.
Vinyl ester was used as the acylating
agent for transesterification because it offers an effective solution to overcome equilibrium.
The acylation process was carried out without solvent, involving only the addition of two molar-equivalent amounts of the acylating
agent to a solution of 1 in pyridine (1 : 2) at -5[degrees]C, followed by stirring for 10 h at 25[degrees]C.
Hunter, "The labelling of proteins to high specific radioactivities by conjugation to a 125I containing acylating
Due to the weak nucleophilicity of the amino group of the 2-aminothiazole and its 4-phenyl derivative by participation in resonance with the pi- system, condensation with activated acylating
reagents such as chloroformates, acid chlorides and acid anhydrides provided a good strategy to prepare a number of thiazole derivatives via nucleophilic substitution reactions.
Furthermore, the aromatic amide (+)-tembamide (5), and the phenylpropanoid (+)-ailanthoidiol (6) were esterified with different acylating
reagents to afford seven alkanoyi/aroyl esters (7-13).
He begins with the reagents and processes: alkylating agents, acylating
agents, nitration and nitrosylation, oxidation, and modifying proteins with reducing agents.
The role of NBS is not clear in the acetylation reaction but a plausible explanation is that NBS might act as a source for Br+ which in turn activates the carbonyl groups of acetic anhydride to produce the highly reactive acylating
Like simple alcohol, the hydroxyl groups of cellulose can be esterified by reactions with acids or other acylating
The most commonly used initiators for cationic polymerization are protic acids, Lewis acids, stable organic salts and alkylating or acylating
A few pieces of ice was added to the reaction mixture to decompose unreacted (excess) acylating
agent and extracted with dichloromethane (DCM) (3 x 5 mL).
Amidoxime is effective [alpha]-nucleophile and its O-nucleophilic characteristics revealed a unique capability of reacting with an acylating
agent in the basic, neutral, and acidic media [8, 9].