Detail of "20739-58-6"

Reference

Radical cyclization of unsaturated a-sulfonyl radicals

Radical cyclization of unsaturated a-sulfonyl radicals. Preparation and stereochemistry of arylsulfonyltetrahydrofuran and -pyrrolidine. Ueno, Yoshio; Khare, R.Several substances are used for example 89479-05-0 and 20739-58-6 which are their cas registry numbers. K.; Okawara, Makoto (Res. Lab. Resour. Util., Tokyo Inst. Technol., Yokohama 227, Japan). J. Chem. Soc., Perkin Trans. 1, (11), 2637-40 (English) 1983. CODEN: JCPRB4. ISSN: 0300-922X. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 22 Treatment of p-MeC6H4SO2CHBrCH2OCHR1CH:CHR-(E) (I; R = H, Me, Pr, R1 = H; R = H, R1 = Me) with Bu3SnH in C6H6 contg. AIBN at 70° for 7-13 h gave the corresponding tetrahydrofurans II in which the trans-isomer predominated. This stereoselectivity increased with increasing size of R: for I (R = Me, R1 = H), the cis/trans ratio of II was 41.6:58.4, whereas for I (R = Pr, R1 = H) it was 0.3:99.7. Similar cyclization of p-MeC6H4SO2CHBrCH2NHCH2CH:CH2 gave 79% 3-(p-toluenesulfonyl)-4-methylpyrrolidine as a 9.7:90.3 mixt. of cis and trans isomers. Radical cyclization of p-MeC6H4SO2CHBrCH2OCH2CYCR (R = Ph, pentyl) gave the corresponding alkylidenefurans III in 85 and 93% yield, resp. Reaction mechanisms and steric effects are discussed. .

Experiments with a two-component sex attractant of the silver Y moth (Autographa gamma L

Experiments with a two-component sex attractant of the silver Y moth (Autographa gamma L.), and some evidence for the presence of both components in natural female sex pheromone. Toth, M.; Szocs, G.; Majoros, B.; Bellas, T. E.; Novak, L. (Res. Inst. Plant Prot., Budapest H-1525, Hung.). J. Chem. Ecol., 9(9), 1317-25 (English) 1983. CODEN: JCECD8. ISSN: 0098-0331. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) (Z)-7-Dodecen-1-yl acetate [14959-86-5] and (Z)-7-dodecen-1-ol [20056-92-2] were synthesized and tested on males of the silver Y moth (A. gamma) for sex attractant activity. The key step of the synthesis was the isomerization of 2-octyn-1-ol [20739-58-6] with K 3-aminopropylamide [54856-92-7]. In electroantennogram tests with a series of dodecen-1-yl acetates and alcs., the highest activity was elicited by these 2 compds. In field tests using 3 different kinds of dispensers, highest catches were achieved with a mixt. 20739-58-6 and 13175-44-5 which are cas registry numbers of chemicals are mentioned. of (Z)-7-dodecen-1-yl acetate and (Z)-7-dodecen-1-ol which contained 1-5% of the alc. Both compds. were present in exts. of the abdominal tip of females. The quantities of these components in the ext. was 1.0 ng/female for the acetate, and 1.1 ng/female for the alc. .