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35.2.4.1.2.1 Variation 1: Reactions with Aliphatic and Alicyclic Alkenes

DOI: 10.1055/sos-SD-035-00418

Pfeiffer, W. D.Science of Synthesis, (200735424.

N-Bromosuccinimide reacts with hept-2-ene to afford 4-bromohept-2-ene (2), although the yield varies between 58 and 76% (Scheme 2).[‌10‌,‌11‌] In similar reactions a variety of products are possible; thus, octene yields both trans-1-bromooct-2-ene (3) and 3-bromooctene (4) in a ratio of 4.4:1 and in 65% overall yield. A 15% yield of dibrominated and higher brominated octanes are also obtained.[‌12‌] The reactions of dienes often lead to products by allylic rearrangement; for example, hexa-1,5-diene gives 1-bromohexa-2,5-diene as well as some 3-bromohexa-1,5-diene, whereas hexa-1,5-diene reacts with 2 equivalents of N-bromosuccinimide to give 1,6-dibromohexa-2,4-diene.[‌13‌,‌14‌]

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Meeeee 8 Meeeeeee ee Meeeeeeee-8,8-eeeee eeee M-Meeeeeeeeeeeeeee[‌88‌]

Mee eeeeeeee ee 8-eeeeeeeeeeeeee-8-eee eeee M-eeeeeeeeeeeeeeee eeeeeee 8-eeeee-8-eeeeeeeeeeeeee-8-eee, eeee e eeeee ee 8-eeeee-8-eeeeeeeeeeeeee-8-eee,[‌88‌] eeeeeee 8,8-eeeeeeeeeeeeeeee-8-eee eeeee 8-eeeee-8,8-eeeeeeeeeee-8-eee,[‌88‌] eee 8-eeeeeeeeeeeeee-8-eee eeeeee 8-eeeee-8-eeeeeeeeeeeeee-8-eee.[‌88‌] Me eeee eeee eeeeee eeeee eeeee eeeeee ee eeeeeeeeeee ee eee α-eeeeeeee ee eee eeeeeeee eeeeee eeee. M eeeeeeeee eeeee eeeeeeee ee e eeeeee eeee ee eeee eeeeeeee eeee e eeeeeeeee eeeee eeeeeeee ee e eeeeee eeee eee, ee eee eeee ee eee-8-ee-8-eee (88), 8-eeeeeeee-8-ee-8-eee (88) ee eeeeeeee ee 88% eeeee, eeeeeeee eeee 8-eeeeeeee-8-ee-8-eee (88, 8%), eeeee ee eeeeeee ee eeeee ee ee eeeeeee eeeeeeeeeeeee ee 8-eeeeeeee-8-ee-8-eee. 8-Meeeeeeee-8-ee-8-eee (88) eee 8-eeeeeeeee-8-ee-8-eee (88) (eeeee 88:8) eee eeeeeeeee eeeeeeee eeee eeee-8-ee-8-eee (88) (Meeeee 8).[‌88‌]

Meeeee 8 Meeeeee Meeeeeeeeee ee Meeeeeeeee Meeeeeeeeeee[‌88‌]

Meeeeeeeeeee Meeeeeeee

(M)-8-Meeeeeeee-8-eee (8); Meeeeee Meeeeeeee:[‌88‌]

MMMMMMM: Meeeeeeee eeeeeeee ee ee eee, eeee, eee eeeeeeeeeee eeeee eeeeeeee eeee eeeeeeee ee eeeeeee eee eee eeeeeee eeeeeeeeeeeee eeee eee.

Meee-8-eee (88e, 8.88eee), MMM (88.8e, 8.88eeee), MMMM (8.8e), eee MMe8 (888eM) (MMMMMMM: eeeee) eeee eeeeee ee e eeeee-eeeeee eeeee (888-eM eeeeeeee) eeeeee eeee e eeeeeee, eeeeee eeeeeeeee, eee M8 eeeee eeee. Mee eeeeeee eee eeeeeee eee eeeeeeee eeeee M8 eee 8e, eeeeee eeeee eeeeee, eee eee eeeeeeeeeee eeee eee eeeeee eee eeeeeee ee eeeeeeeeee. Meee eeeee eeeeeeee eee eeeeee eeee MMe8 (8×88eM) eee eee eeeeeeee eeee eeeee ee eee eeeeeeee. Mee MMe8 eee eeeeeee eeee eee eeeeeeee ee eeeeeeeeeeee eeeee eeeeeee eeeeeeee eeeeeee e eeeeee (88ee) eeeeee eeee eeeee eeeeeee. Mee eeeeeee eee eeee eeeeeeeee eeeee eeeeeee eeeeeeee eeeee e Meeeeee eeeee. Meee eeeeeeeeeeeee eeee eeeeeee eee eeeee M8; eeeee: 88.8e (88%); ee 88.888°M/88Meee; e88M 8.8888.

eeeee-8-Meeeeeee-8-eee (8) eee 8-Meeeeeee-8-eee (8); Meeeeee Meeeeeeee:[‌88‌]

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eee eee eeeee-8,8-Meeeeeeeeeeeeeee-8-eee (8); Meeeeee Meeeeeeee:[‌88‌]

MMMMMMM: Meeeeeeee eeeeeeee ee ee eee, eeee, eee eeeeeeeeeee eeeee eeeeeeee eeee eeeeeeee ee eeeeeee eee eee eeeeeee eeeeeeeeeeeee eeee eee.

M eeeeeee ee eeeeeeeeeeee (88.8e 8.88eeee), MMM (888.8e, 8.88eee), eee MMMM (8e, 8.88eeee) ee MMe8 (888eM) (MMMMMMM: eeeee) eee eeeeeeee eee 8e, eeeeee eeee eee, eee eeeeeeee ee eeeeee eeeeeeeeeee. Mee eeeeeeee eee eeeeee eeee M8M, eeeee (MeMM8), eee eeeeeeeeeeee eeeee eeeeeee eeeeeeee. Mee eeeeeee eee eeeeeeeee eeeeeee ee eeeeee. Meeee eeeee ee eee- eee eeeee-8,8-eeeeeeeeeeeeeeee-8-eeee: 88e (88%). Mee eeeeeee ee eeeeeeeeee eee eeeeeeeee ee eeeeeeeeee eeeeeeeeeeee eeeee e Meeeeee eeeeee: eee-eeeeee; ee 8888°M/8Meee; eeeee-eeeeee; ee 88°M/8Meee.

8-Meeeeeeeeeeeeeee (8); Meeeeee Meeeeeeee:[‌88‌]

M eeeeeee ee MMM (88.8e, 88eee) eee eeeeeeeeeee (88.8e, 8.88eee) [eeeee ee eeeeeeeeee eeeeeeeee ee eeeeeee eeeeeeeeeeee eeeeeeeeeeeee (8.88eee·M8)] eee eeeee eeeeeee (MMMMMMM: eeeeeeeeee) eee eeeeee eeee eeeeeeee eee 88eee. Meeee eeeeeee eee eeeeeee ee eee eeeeeeeeeee eeee eee eeeeee ee eeeeeeeeee, eee eeeeeeee eee eeeeeeeeeeee eeeeeeeee eeeee eeeeeee eeeeeeee; eeeee: 88e (88%); ee 8888°M/8Meee.

References


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