annulation

Successful preparation of compounds using the Robinson annulation methods have been reported.

Robinson annulation has had application in the total synthesis of steroids.

This is an example of the Robinson annulation.

They are of a light yellowish brown color, the legs having light-dark annulation.

This annulation provides an efficient route to form an aromatic ring in one step.

The development of a new, synthetically useful methylenecyclohexane annulation method is described.

The Robinson annulation is a chemical reaction used in organic chemistry for ring formation.

They were divorced, though an appeal to the Catholic Church for an annulation was rejected.

In contrast, the corresponding homolog 56, under very similar conditions, produced only a minor amount of the annulation product 55.

The annulation reaction will also proceed more efficiently when 2-5 equivalents of an alkyne is used.

It is also known as Larock hetero annulation.

They are annulated, although the annulation may be difficult to discern, due to their close spacing ( 0.2mm) and low relief.

Dichloromethane, chloroform, and 1,2-dichloroethane, are all appropriate solvents for the annulation reaction.

Males have a wider range in annule size and a different pattern of body annulation than that of the female.

Specifically, the synthesis of cortisone is completed through the use of the Robinson annulation.

The second major step, which is also the rate-determining step, is the annulation of the molecule.

Studies have been completed on the formation of the hydroxy ketones in the Robinson annulation reaction scheme.

They are covered with thin lining which has a transverse ornamentation in the form of fusiform annulation.

Paucipodiidae - with no dorsal sclerites, two claws, fine annulation and few segments.

Bases other than sodium or potassium carbonate have been used to produce a good overall yield of the annulation reaction.

Immediately following the annulation, there is a proton transfer, which eliminates the positive formal charge on the nitrogen atom.

Alkynyl thioethers and ynamines have been used as reactants in the annulation reaction.

Your rapporteur notes, in particular, the annulation in district n° 15 where two of the Assembly's teams observed serious irregularities.

The key Robinson annulation step was reported to be accomplished in one pot using L-proline for chiral control.

A classical tandem sequence of Michael and aldol additions is the Robinson annulation.