摘要:
Octadienyl esters of 2-ethylidene-hepta-3,5-dienoic and 2-vinyl-hepta-3,5-dienoic acids of formula C.sub.8 H.sub.11 COOC.sub.8 H.sub.13 and .delta.-lactone of formula ##STR1## or 2-ethylidene-hepta-6-ene-5-olide, are prepared by reaction of 1,3-butadiene with CO.sub.2 at a temperature comprised between about 20.degree. and 150.degree. C. and at a total pressure between about 10 and 500 atm in the presence of a phosphinic complex of palladium having the formula Pd[P(R).sub.3 ].sub.x, wherein x is an integer from 2 to 4, and (R).sub.3 is a homogeneous or heterogeneous group consisting of alkyls, cycloalkyls having up to 8 carbon atoms and of phenyls, also substituted, in an inert atmosphere.The obtained products are "per se" new and are valuable intermediates for synthesis of chemicals (fungicides, pesticides, etc.) and in particular as effective plasticizers.
摘要翻译:式C 8 H 11 COOC 8 H 13的2-亚乙基 - 庚-3,5-二烯酸和2-乙烯基 - 庚-3,5-二烯酸的辛二烯基酯和式(II)的δ-内酯或2-亚乙基 - 七 烯-5-醇通过1,3-二丁烯与CO 2在约20-150℃的温度下反应并在约10-500atm的总压下在次膦酸盐络合物 具有式Pd [P(R)3] x的钯,其中x是2至4的整数,(R)3是由烷基,具有至多8个碳原子的环烷基和苯基组成的均相或异质基团 也在惰性气氛中取代。
摘要:
Novel aliphatic hydrocarbon di-olefinic acids, esters, thiolesters, and derivatives thereof, intermediates therefor, syntheses thereof and the control of insects.
摘要:
A process for the production of a .DELTA..sup.4 -gonenic steroid having the formula ##SPC1##Wherein R represents a member selected from the group consisting of hydrogen and the acyl of an organic carboxylic acid having from 1 to 18 carbon atoms, R' represents an alkyl having from 1 to 4 carbon atoms, R.sup.iv represents a member selected from the group consisting of lower alkyl, lower alkenyl or lower alkynyl, and B represents a member selected from the group consisting of two hydrogens in the 9.alpha. and 10.beta. position and a double bond which comprises the steps of reacting a 3-ketal-4,5-seco-gonane-5-one with a ketalizing agent, oxidizing the resultant 3,5-diketal-4,5-seco-gonane-17.beta.-ol, reacting the resultant 3,5-diketal-4,5-seco-gonane-17-one with an organometallic compound, hydrolyzing the resultant 3,5-diketal-17.alpha.-R.sup.iv -4,5-seco-gonane-17.beta.-ol, cyclizing the resultant 17.alpha.-R.sup.iv -4,5-seco-gonane-17.beta.-ol-3,5-dione and recovering said .DELTA..sup.4 -gonenic steroid. The novel intermediates are also part of the invention. The .DELTA..sup.4 -gonenic steroids are known compounds having steroidal properties.
摘要:
Antibiotic steffimycinone (U-25,055), produced by acid hydrolysis or methanolysis of antibiotic steffimycin (U-20,661), or steffimycin B, and 7-deoxysteffimycinone (U-25,920) produced by hydrogenolysis of steffimycin or steffimycin B (U-40,615). Steffimycinone is active against various microorganisms, for example, Bacillus subtilis, Mycobacterium avium and Bacillus cereus; 7-deoxysteffimycinone is active against Sarcina lutea and Mycobacterium avium. Thus, these antibiotics can be used to inhibit the growth of the above microorganisms in various environments.
摘要:
2,5-Diketogluconic acid, alkyl esters or salts thereof, are reduced by an amine-borane to 2-ketogulonic acid, an intermediate for the preparation of ascorbic acid.
摘要:
Polyene esters, ethers, carbamates, thioesters, amides, carbonyls and nitriles, containing at least one pair of conjugated double bonds, which are useful in killing pests, such as insects, and preventing the proliferation of such pests by upsetting their hormonal balance.
摘要:
Allylic primary and secondary alcohols are prepared by rearranging allylic tertiary alcohols in the presence of a catalyst comprising a metal of group Va, VIa or VIIa of the Periodic Table of Mendeleev.