2- bromo-2-hydroxy-3,4-dihydro

Ben2o[i]furan, cis-5-bromo-2,3-dihydro-3-hydroxy-2-isopropyl-... 

Thiazolo[3,2-a]pyridinium, 6-amino-2,3-dihydro- H NMR, 6, 675 (78ACS(B)70) Thiazolo[3,2-a]pyridinium, anhydro-7-bromo-3a-carboxy-2,3-dihydro-8-hydroxy-2ft5-dimethyl-1 or-0X0-... 

Farnesyl, 10-bromo-10,l 1-dihydro-l 1-hydroxy-, acetate [2,6-Dodecadiene-1,11-diol, 10-bromo-3,7,11-trimethyl-, 1-acetate, ( , )-], 113 Ferrocene, 28... 

Other examples are given by the reaction of rra j-10-bromo-10,ll-dihydro-ll-hydroxy-5H-dibenz[b,f]azepine-5-carbonyl chloride with gaseous HBr in CCI4 to give the expected trans dibromide and the corresponding olefin in an about 3 7 ratio (Table 6) (ref. 20). The same reaction of 10-bromo-10,11-dihydro-11-... 

In addition to the previously noted heterocycle syntheses under ring assembly, reaction of a cationic P-bromo-1 -aryl-2,3-dihydro-1.3.2-di i/ iphoxphininiiim salt 28 (X=Br) with sodium hydroxide in toluene gave the corresponding P-hydroxy derivative (see Sect. 4.3) [89],... 

A novel ring-closure starting from 2-aryl-l-(12/-l,2,4-triazol-l-yl)alk-3-yn-2-ols has been reported <2006T8966>. Treatment of these alkynols with Bt2 at room temperature yielded 5-alkyl-7-aryl-6-bromo-7-hydroxy-7,8-dihydro-[l,2,4]triazolo[l,2- ]pyridazin-4-ium bromides which upon hydrolysis give 3-alkyl-5-arylpyridazines. 

Reactions of 3-hydroxy-6-methyl-2(lfl)-pyridinethione with 1,3-dibromo-propanes in methanol in the presence of sodium methylate yielded betaines (205) (70ACS2949). 9-Hydroxy-3,4-dihydro-2f/-pyrido[2,l-6][1,3]-thiazinium bromide was obtained in the reaction of 3-hydroxypyridine-2(lH)-thione and l-bromo-3-chloropropane in boiling toluene [81JCR(S)208]. 

Hydroboration and oxidation of 3,4-dihydro-2-methoxy-2//-pyran gives a mixture of cis- and rra s-5-hydroxy-2-methoxytetrahydropyran (70CJC2334). After methylation, trans-2,5-dimethoxytetrahydropyran was isolated in small amounts. The cis isomer was obtained from 3,4-dihydro-3-methoxy-2//-pyran via 3-bromo-2,5-dimethoxytetrahydropyran. 

Nitro-, 5-hydroxy-, and 6-bromo-2,3-dihydro-benzo[ ]thiophene-... 

H- 1-Benzothiin, 3-bromo-4-hydroxy-3,4-dihydro-dehydration, 3, 908 2//-1-Benzothiin, 3,4-dibromo-thiophene synthesis from, 4, 902 277-1-Benzothiin, 3,4-dihydro-acylation, 3, 908 sulfilimines from, 3, 905 277-1-Benzothiin, 4-ethoxy-reactions... 

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