ring closure

ring closure

[′riŋ ‚klō·zhər]
(organic chemistry)
A chemical reaction in which one part of an open chain of a molecule reacts with another part to form a ring.
References in periodicals archive ?
There will be a full closure of the eastbound carriageway with lane 2 closures westbound and an outer ring closure at Kenton Bar Junction 77 between 8pm and 6am, with local diversions in place.
Contract notice: Ring closure corn - arnbruck, Reg 22
Kiselyov reported a base-promoted intramolecular ring closure of ortho-trifluoromethyl benzyl heterocycles 3 en route to nine tricyclic 4-fluoroisoquinoline derivatives 4.
The aim of this study was to evaluate the use of homologous pericardium grafts for internal inguinal ring closure in horses, comparing mechanical or manual laparoscopic suture.
Among their topics are the inertia of conventional functional groups, the aldol condensation, macrocycles from reluctant ring closure to reluctant ring opening, transformations mediated by transition metals versus conventional reactions, oxidations and carbon-carbon bond building, and the failure of epoxide ring opening and the limits of cascade reactions.
The hernial ring closure with silk no.1 with purse string technique and thereafter closure of the ring by overlapping technique was helpful in closure of the inguinal ring.
The Slit Ring Closure Method was adopted to validate whether by introduction of the PP skin, the overall residual stress in the hoop direction is reduced or not.
According to "Baldwin's Rules for Ring Closure," which govern the way these rings form, lasalocid should contain a five-membered ring instead of the observed six-membered ring.
This aldimine yields the isoquinoline product 8 after acid catalyzed ring closure. The synthesis of these structures is significant since many medicinal compounds contain isoquinoline structures.
the construction work includes the work for the structure of the sdring overpass in the course of the erdinger ring closure. The building is located in the railway km 24.690 of the new track 5601 to be built and in the course of the expansion airport east between building km 1 + 822.262 and 1 + 883.912.
- gravel works for the drinking water pipeline (ring closure)
The drinking water pipeline as ring closure is approx.