directed substitution

См. также в других словарях:

• Directed ortho metalation — (DoM) is an adaptation of electrophilic aromatic substitution in which electrophiles attach themselves exclusively to the ortho position of a direct metalation group or DMG through the intermediary of an aryllithium compound [1]. The DMG… …   Wikipedia

• Import substitution industrialization — (also called ISI) is a trade and economic policy based on the premise that a country should attempt to reduce its foreign dependency through the local production of industrialized products. Adopted in many Latin American countries from the 1930s… …   Wikipedia

• Electrophilic aromatic substitution — or EAS is an organic reaction in which an atom, usually hydrogen, appended to an aromatic system is replaced by an electrophile. The most important reactions of this type that take place are aromatic nitration, aromatic halogenation, aromatic… …   Wikipedia

• fideicommissary substitution — noun 1. : the substitution under Roman and civil law of another heir or donee by a fideicommissum or direction that the original heir or donee at his death or upon some state event or condition transfer the inheritance or gift or a part thereof… …   Useful english dictionary

• Passing chord — in B♭ from across the circle of fifths (tritone, see also tritone substitution): B♮7 …   Wikipedia

• spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium

• theatre — /thee euh teuhr, theeeu /, n. theater. * * * I Building or space in which performances are given before an audience. It contains an auditorium and stage. In ancient Greece, where Western theatre began (5th century BC), theatres were constructed… …   Universalium

• DEBS (6-deoxyerythronolide B synthase) — 6 Deoxyerythronolide B Synthase or DEBS has been identified as a Type 1 polyketide synthase. DEBS is found in Saccharopolyspora erythraea and responsible for the synthesis of the macrolide ring which is the precursor of the antibiotic… …   Wikipedia

• Nazarov cyclization reaction — The Nazarov cyclization reaction (often referred to as simply the Nazarov cyclization) is a chemical reaction used in organic chemistry for the synthesis of cyclopentenones. The reaction is typically divided into classical and modern variants,… …   Wikipedia

• First-order logic — is a formal logical system used in mathematics, philosophy, linguistics, and computer science. It goes by many names, including: first order predicate calculus, the lower predicate calculus, quantification theory, and predicate logic (a less… …   Wikipedia

• international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …   Universalium