摘要:
The present invention relates to polyamine derivatives of the formula RHN-(CH.sub.2).sub.m -NH-(CH.sub.2).sub.n -NHR wherein m is an integer from 2 to 4, n is an integer from 3 to 10 and R is C.sub.2 -C.sub.6 alkyl or --(CH.sub.2).sub.p -Ar wherein Ar is phenyl or naphthyl and p is an integer from 0 to 2; and the pharmaceutically acceptable addition salts thereof which are useful as radioprotective agents. It relates also to the use of polyamines of the formula RHN-(CH.sub.2).sub.m -NH-(CH.sub.2).sub.n -NH-(CH.sub.2).sub.m -NHR wherein m is an integer from 2 to 4, n is an integer from 3 to 10 and R is C.sub.2 -C.sub.6 alkyl or --(CH.sub.2).sub.p -Ar wherein Ar is phenyl or naphthyl and p is an integer from 0 to 2; and the pharmaceutically acceptable addition salts thereof as radioprotective agents.
摘要:
The invention relates to 2,7-substituted-9-substituted fluorenes and 9-substituted fluorene oligomers and polymers. The fluorenes, oligomers and polymers are substituted at the 9-position with two hydrocarbyl moieties which may optionally contain one or more of sulfur, nitrogen, oxygen, phosphorous or silicon heteroatoms; a C.sub.5-20 ring structure formed with the 9-carbon on the fluorene ring or a C.sub.4-20 ring structure formed with the 9-carbon containing one or more heteroatoms of sulfur, nitrogen or oxygen; or a hydrocarbylidene moiety. In one embodiment, the fluorenes are substituted at the 2- and 7-positions with aryl moieties which may further be substituted with moieties which are capable of crosslinking or chain extension or a trialkylsiloxy moiety. The fluorene polymers and oligomers may be substituted at the 2- and 7'-positions. The monomer units of the fluorene oligomers and polymers are bound to one another at the 2- and 7'-positions. The 2,7'-aryl-9-substituted fluorene oligomers and polymers may be further reacted with one another to form higher molecular weight polymers by causing the optional moieties on the terminal 2,7'-aryl moieties, which are capable of crosslinking or chain extension, to undergo chain extension or crosslinking. Also disclosed are processes for preparing the disclosed compounds.
摘要:
The present invention relates to a process for preparing protected amines or amino acids. The invention furthermore relates to the use of tocopheryl radicals or radicals derived therefrom as protective groups for amines and amino acids, and to compounds obtained in this process as intermediates and to processes for preparing dipeptides and oligopeptides.
摘要:
The invention relates to biphenyl derivatives of general formula ##STR1## wherein A to E and X are defined as in claim 1, the stereoisomers thereof, including their mixtures and the salts thereof, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases, which have valuable properties, preferably aggregation-inhibiting effects, pharmaceutical compositions containing these compounds and processes for preparing them.
摘要:
A process for the preparation of arylbenzylamines by the reaction of arylamines with a benzyl chloride, wherein the reaction is carried out in the presence of both a phase-transfer catalyst and a base selected from the group consisting of the inorganic bases and salts of weak organic acids.
摘要:
Fluorinated alkene compounds useful for and methods of controlling nematodes, insects, and acarids that prey on agricultural crops. Polar compounds, for example, 3,4,4-trifluoro-3-butene-1-amine or 3,4,4-trifluoro-3-butenoic acid, are particularly useful for systemic control of pests. Novel method and intermediates for the preparation of 3,4,4-trifluoro-3-butene-1-amine are also provided.
摘要:
The present invention provides a highly sensitive and highly durable electrophotographic photoconductor providing a conductive support and a photosensitive layer formed thereon, the photosensitive layer comprising a bis-enamine compound of the formula (I): ##STR1## wherein "A" is a C.sub.6-12 arylene group which may have a substituent, a bivalent heterocyclic reside which may have a substituent, a C.sub.2-4 lower alkylene group which may have a substituent; "B" is a lower dialkylamino group, a lower alkoxy group, a lower alkyl group, a hydrogen atom or a halogen atom; and k is an integer from 1 to 5 provided that when k is an integer of 2 or more, "B" may be identifcal or different, may together form a ring; and n is an integer from 2 to 4. The electrophotographic photoconductor according to this invention is excellent in stability resisting fluctuations in temperature and humidity, high in electric chargeability, almost free from reduction in photosensitivity in repetitive use and also free from deterioration in image quality such as defection in toner images.
摘要:
1-Azabutadienes of the formula ##STR1## where R.sup.1 and R.sup.2 are each phenyl, biphenyl, naphthyl or pyridyl, and these radicals may be substituted, or are each alkyl which is unsubstituted or substituted, R.sup.3 is substituted or unsubstituted phenyl or a radical OR.sup.4, where R.sup.4 is hydrogen, alkyl or an aromatic or aliphatic acyl group, or R.sup.3 is a radical NHR.sup.5, where R.sup.5 is hydrogen, substituted or unsubstituted phenyl, or the carbamide group, and fungicidal agents containing these compounds.
摘要:
The novel compounds of the general formula I ##STR1## where X is straight-chain or branched alkanediyl having from 1 to 20 carbon atoms orX is straight-chain or branched alkanediyl having from 2 to 20 carbon atoms, whose carbon chain is interrupted by --O--, --S-- and/or --NR--,R is hydrogen, straight-chain or branched alkyl having from 1 to 6 carbon atoms or cycloalkyl, andY is a non-centrosymmetric radical containing an easily polarized conjugated .pi.-electron system and at least one terminal electron-acceptor group,having nonlinear optical properties, are highly suitable as nonlinear optical materials for nonlinear optical arrangements and for the preparation of polymers having nonlinear optical properties. In particular, they can be used to prepare organopolysiloxanes having nonlinear optical properties and containing side groups of the general formula Ia ##STR2## in which the variables are as defined above. These novel organopolysiloxanes having nonlinear optical properties are also highly suitable for the production of Langmuir-Blodgett layers.
摘要:
The selective ring-alkylation of anilines comprising providing a mixture of a lower alkanol and an aniline, exposing said mixture to a temperature of from 300.degree. C. to 500.degree. C., preferably from 350.degree. C. to 450.degree. C., in the presence of an acidic Y-type zeolite is described. The Y-type zeolites are predominantly selective to the formation of para-alkylanilines.