Synthesis of some new heterocyclic derivatives of 1,8-Naphthyridine with substitution on the Naphthyridine ring تشييد لبعض المركبات الحلقيه غير المتجانسه.

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Synthesis of some new heterocyclic derivatives of 1,8-Naphthyridine with substitution on the Naphthyridine ring تشييد لبعض المركبات الحلقيه غير المتجانسه المشتقه من - نفثايردين بمعوضات على حلقة النفثايردين8,1

حضرت مجموعة من مشتقات حوامض 8,1- نفثايردين وبنسب جيدة. شخصت المركبات المحضرة باستخدام الأشعة تحت الحمراء (IR) وطيف الرنين النووي المغناطيسي ( 1 H NMR), حيث اعتبر المركبان (1) و (6) هما المادتان الأساسيتان لتحضير المركبات الأخرى. تم استخدام طريقة دوبنر (Doebner reaction) لتحضير المادتان الاساسيتان حيث تمتاز هذه الطريقة بسهولة التحضير مقارنة بالطرق المستخدمة سابقاً وبنسب جيدة. الخلاصــــة:

Morpholine-4-formyl 5-Nitro-2-amino pyridine pyruvic acid 6-Nitro-2-morpholino-1,8- naphthyridine-4-carboxylic acid

Scheme (1) Reagent and conditions: I. I. Thionyl chloride, 2 hr. II. II. Toluene, N,N-Diethylethylenediamine, 2 hr. III. III. Water, Fe, HCl, 90 ºC, 6 hr. IV. IV. Acetic anhydride, 80 ºC, 12 hr.

5-Chloro-2-morpholino-1,8- naphthyridine-4-carboxylic acid 2-amino-4-chloro pyridine

Scheme (2) Reagent, conditions and yields: I. I. MeOH, KOH, 90 ºC, 70%. II. II. PhCH 2 NH 2, 120 ºC, 35%. III. III. Triethylene glycol, KOH, THF, 80 ºC, 70%. IV. IV. NaNH 2, 120 ºC, 30%.

Compound No. 1 H NMR (ppm) – DMSO-d (s,1H)11.00 (s,1H), 8.45 (s,1H), 8.24 (s,1H), 8.11 (s,1H), 3.65 (t,4H), 2.88 (t,4H) (s,1H), 8.20 (s,1H), 8.10 (s,1H), 3.65 (t,4H), 2.88 (t,4H) (m,1H8.68 (m,1H), 8.32 (s,1H), 8.20 (s,1H), 7.24 (bs,1H), (m,4H), 3.68 (q,2H), 2.25 (t,3H), 3.95 (t,4H), 2.88 (t, 4H) (s,1H), (s,1H), 8.38 (s,1H), 7.95 (s,1H), 7.85 (s,1H), 5.65 (bs,2H), 3.65 (t,4H), 2.94 (t,4H).5.65 (bs,2H (s,1H), (s,1H), 8.45 (s,1H), 8.25 (bs,1H)), (m,1H), (m,1H), 3.65 (t,4H), 2.85 (t,4H), 2.70 (s,3H).8.25 (bs,1H) (s,1H), 8.22 (s,1H), 7.86 (d,1H), 3.62 (t,4H), 2.86 (t,4H) (s,1H), 8.66 (d,1H), 8.22 (d,1H), 7.95 (s,1H), 3.62 (t,4H), 2.86 (t,4H), 2.62 (s,3H) (s,3H) (s,1H), 8.86 (d,1H), 8.44 (d,1H), 8.12 (s,1H),7.86 (bs,1H), (m,5H)), 4.55 (d,2H), 3.68 (t,4H), 2.84 (t,4H).7.86 (bs,1H) (m,5H) (s,1H), (m,1H), (m,1H), (m,1H), 4.62 (t,4H), 4.20 (t,4H), 3.96 (t,4H), 3.66 (t,4H), 2.82 (t,4H) (t,4H), 4.20 (t,4H), 3.96 (t,4H), 3.66 (t,4H), 2.82 (t,4H) (s,1H), 7.85 (d,1H), 7.64 (d,1H), 7.15 (s,1H), 2.86 (t,2H), 3.62 (t,2H), 5.42 (bs,2H) 5.42 (bs,2H) Table 1: 1 H NMR data of compounds

Table 2: Physical data of compounds Comp. No. Formula m.p °C Yield % IR data (ν cm -1 ) KBr C=ON – HN – CC=C, C=NC-O-CC – ClNO 2 OH 1 C 13 H 12 N 4 O C 13 H 11 N 4 O 4 Cl C 19 H 26 N 6 O C 13 H 14 N 4 O C 15 H 16 N 4 O and C 13 H 12 N 3 O 3 Cl C 14 H 15 N 3 O C 20 H 20 N 4 O C 32 H 36 N 6 O C 13 H 14 N 4 O

شكراً لإصغائكم وأتمنى لكم الموفقية والنجاح الدائم وأتمنى لكم الموفقية والنجاح الدائم