3- Heptynoic acid

Halide exchange reaction, 66, 87 2,5-Heptadien-4-ol, 3,4,5-trimethyl-, 65, 42 Heptanal (111-71-7), 65, 26 3-HEPTANONE, 4-METHYL-, (S)-, 65, 183 5-Heptynoic acid, 7-hydroxy-, methyl ester, 67, 193... 

Methyl 7-hydroxyhept-5-ynoate 5-Heptynoic acid, 7-hydroxy-, methyl ester (9) (50781-91-4)... 

In the reactions shown above, preferential jS-heteroatom elimination occurs rather than jS-H elimination. Lu reported that the presence of a halide ligand effectively blocks jS-H elimination. Thus the different products were obtained depending on the amounts of added LiBr in the reaction of 3-heptynoic acid (393) with acrolein. In the presence of 200 mol% LiBr in AcOH, protonolysis occurs to give 395 and Pd(II), while the unsaturated aldehyde 394 was obtained by a... 

Bromo-5-heptynoic acid, B-60261 2-Bromo-3-methoxy-2-cyclohexen-1 -one, in... 

PHAs containing carbon-carbon triple bonds synthesized by P. oleovorans and P. putida grown with 10-undecynoic acid (10-UND=) have been reported [64]. The amount of carbon-carbon triple bond could be controlled between 0% and 100%, but the yield of the PHA containing 100% carbon-carbon triple bond was very low. The repeating units formed from 10-UND= were 3-hydroxy-8-nonynoate (3HN=) and 3-hydroxy-6-heptynoate (3HHp=) units in the amounts of 26 mol% and 74 mol%, respectively. The glass transition temperatures of PHAs synthesized from mixtures of NA and UND= increased from -30°C to -20°C as the content of carbon-carbon triple bond increased from 0% to 100%. These polymers were crosslinked when cations such as Co2+ and Pt2+ were added. 

The Lewis acid-catalysed 3 + 2-cycloaddition of aziridine-2-carboxylates with isocyanates proceeds regio- and stereo-specifically to produce enantiomerically pure 4-substituted imidazolin-2-ones in high yields.33 The reaction of ethyl 7-iodo-2-heptynoate (27), 2-arylaziridines (28), and K2C03 produces polysubstituted indolizidines (30) via an S /formal 3 + 2-cycloaddition (29) process (Scheme 8).34... 

Formaldehyde undergoes Me2AlCl induced reactions with terminal alkynes to give a 2 3 mixture of the ene adduct 10 and the (Z)-chloroalcohol 11 in 50-75% yield (See Figure 4).i3 These products can both be derived from an intermediate such as 4 or 5 and 6. Reaction of formaldehyde, methyl 6-heptynoate and the stronger Lewis acid methylaluminum sesquichloride gives... 

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