摘要:
Novel syntheses of dihalovinylcyclopropanecarboxylates, including potent insecticides, are described. The processes begin with the reaction between an alkenol and an orthoester to produce a .gamma.-unsaturated carboxylate, followed by the catalyzed addition of a carbon tetrahalide to the double bond and dehydrohalogenation to produce a cyclopropane derivative.
摘要:
Novel syntheses of dihalovinylcyclopropanecarboxylates, including potent insecticides, are described. The processes begin with the reaction between an alkenol and an orthoester to produce a .gamma.-unsaturated carboxylate, followed by the catalyzed addition of a carbon tetrahalide to the double bond and dehydrohalogenation to produce a cyclopropane derivative.
摘要:
This disclosure describes certain 11-alkoxy-9-keto-(or hydroxy)prostenoic acid derivatives useful as antimicrobial agents, hypotensive agents, anti-ulcer agents, or as intermediates.
摘要:
DIPHENYLMETHANE DERIVATIVES REPRESENTED BY THE FORMULA,
(R2)M,(((R3)N-PHENYL)-C(-R1)(-R4)-)BENZENE
WHEREIN R1 IS-OR,-COOR OR -CH2OR, IN WHICH R IS PROPARGYL OR ALLYL; R2 AND R3 ARE HYDROGEN, A HALOGEN, AN ALKYL OR METHYLENEDIOXY BONDED TO TWO CARBON ATOMS ADJACENT TO EACH OTHER ON THE BENZENE RING; WHEN R IS PROPARGYL R4 IS HYDROGEN, AN ALKYL, -OR'', -COOR'', -CH2OR'' OR
R"-PHENYL
IN WHICH R'' IS PROPARGYL, ALLYL OR AN ALKYL AND R" IS AN ALKYL OR A HALOGEN, WHEN R IS ALLYL R4 IS -OR''", -COOR''" OR -CH2OR''" IN WHICH R''" IS ALLYL OR AN ALKYL; M AND N AR AN INTEGER OF 1 TO 5 AND WHEN M AND/OR N ARE AN INTEGER OF 2 OR MORE, R2''S AND/OR R3''S MAY BE THE SAME OR DIFFERENT; THE DIPHENYLMETHANE DERIVATIVES BEING EMPLOYABLE AS SYNERGISTS FOR INSECTICIDES.
摘要:
The present application describes amphiphatic compounds like compound IIa below, compositions and methods for incorporating chemoselective and bio-orthogonal complementary functional groups into liposomes. Such compounds are incorporated in greater numbers in liposome and fused cell surfaces, leading to greater adhesion and conjugation efficiency. The present application also describes various uses of these modified liposomes including for tethering the chemoselective and bioorthogonal complementary functional groups from cell surfaces by liposome delivery toward the goal of rewiring the cell surface.
摘要:
The compounds of the invention are characterised by the formulae ##STR1## wherein index p represents an integer equal to 2 or 3 and q can take the value zero or 1, with the provision that p+q=3. Said compounds are obtained from hex-3-yne-2,5-diol following a process which comprises reacting an ethylenic compound of formula(CH.sub.3).sub.2 C.dbd.C(H).sub.n (CH.sub.3).sub.m (I)wherein index n represents an integer equal to 1 or 2 and m can take the values zero or 1 and wherein n+m=2, with hex-3-yne-2,5-diol, followed by the oxidation of the acetylenic ether obtained by means of ruthenium tetroxide. The compounds of formula (III) can be used as intermediate products for the preparation of 4-hydroxy-2,5-dimethyl-3(2H)-furanone (Furaneol.RTM.).